Wood planks are among the most versatile wood products used in construction, woodworking, furniture making, flooring, shelving, landscaping, and decorative projects. They are available in many widths, thicknesses, and lengths, making it important to understand standard plank dimensions before choosing material for a project.
A wood plank size chart provides a quick way to compare common lumber dimensions and understand how different plank sizes are typically used. However, the size printed on a lumber label may not be the exact physical size of the finished plank. Like many other lumber products, wood planks are often identified using nominal dimensions, while their actual measurements can be smaller after drying and surfacing.
Wood plank dimensions can also vary depending on the species, grade, manufacturing process, supplier, and intended application. A wide hardwood plank used for a tabletop may have very different characteristics from a softwood construction plank used for shelving or outdoor work.
In this guide, you will learn about standard wood plank sizes, nominal versus actual dimensions, common thicknesses and widths, typical plank lengths, wood plank types, applications, measurement methods, and important factors to consider when selecting the right plank for your project.
What Is a Wood Plank?
A wood plank is a relatively flat, elongated piece of solid wood that is generally wider and thicker than a thin board or strip.
Wood planks can be manufactured from hardwood or softwood and may be sold rough-sawn, surfaced, kiln-dried, treated, or finished.
Depending on their dimensions and material, planks can be used for:
- Shelves
- Tables
- Benches
- Flooring
- Wall cladding
- Fencing
- Decking
- Furniture
- Workbenches
- Garden projects
- Decorative applications
- Construction projects
The terms plank and board are sometimes used interchangeably, although their exact meanings can vary by industry and region.
Why Wood Plank Size Matters
Choosing the correct plank dimensions can affect strength, appearance, stability, cost, and ease of installation.
A plank that is too thin may bend or break when subjected to a load. A plank that is unnecessarily thick or wide may cost more and be more difficult to handle.
Important dimensions include:
- Thickness
- Width
- Length
- Actual finished dimensions
- Edge profile
- Grain direction
The intended use should always guide the choice of dimensions.
For example, a narrow plank may be suitable for a small shelf, while a wider and thicker plank may be preferred for a tabletop.
Wood Plank Size Chart
The following chart shows common nominal wood plank dimensions and approximate actual dimensions for commonly surfaced lumber.
| Nominal Size | Approx. Actual Thickness | Approx. Actual Width | Common Uses |
|---|---|---|---|
| 1 × 4 | ¾ in | 3½ in | Trim, shelves, small projects |
| 1 × 6 | ¾ in | 5½ in | Shelving, furniture, cladding |
| 1 × 8 | ¾ in | 7¼ in | Shelves, wall boards, furniture |
| 1 × 10 | ¾ in | 9¼ in | Shelving, tabletops |
| 1 × 12 | ¾ in | 11¼ in | Wide shelves, furniture |
| 2 × 4 | 1½ in | 3½ in | General construction |
| 2 × 6 | 1½ in | 5½ in | Shelves, framing, heavy projects |
| 2 × 8 | 1½ in | 7¼ in | Construction and woodworking |
| 2 × 10 | 1½ in | 9¼ in | Wide construction members |
| 2 × 12 | 1½ in | 11¼ in | Heavy-duty woodworking and construction |
Actual dimensions vary according to the product and supplier, so verify the lumber specifications before purchasing.
Nominal vs Actual Wood Plank Sizes
One of the most important concepts when buying wood planks is understanding nominal and actual dimensions.
What Does Nominal Size Mean?
Nominal size is the traditional size used to identify a piece of lumber.
For example, a plank may be sold as a:
1 × 8
This does not necessarily mean that the finished plank measures exactly 1 inch thick by 8 inches wide.
What Is the Actual Size?
The actual size is the physical measurement of the finished product.
A commonly surfaced nominal 1 × 8 plank may measure approximately:
¾ × 7¼ inches
The reduction in dimensions can occur during drying and surfacing.
Why Actual Measurements Matter
Actual measurements are important when:
- Building furniture
- Creating shelving
- Installing trim
- Designing joints
- Calculating material quantities
- Matching replacement boards
- Creating woodworking plans
Always measure the actual plank when precision is important.
Common Wood Plank Thicknesses
Thickness is one of the primary dimensions used to select a wood plank.
¾-Inch Planks
Planks around ¾ inch actual thickness are common for lighter woodworking applications.
They can be suitable for:
- Shelves
- Cabinet components
- Wall cladding
- Small furniture
- Decorative panels
1½-Inch Planks
A nominal 2-inch lumber product commonly finishes at approximately 1½ inches thick.
These thicker planks are often used when greater stiffness and durability are needed.
Potential applications include:
- Workbenches
- Heavy shelves
- Furniture
- Construction
- Outdoor projects
Thicker Wood Planks
Specialty lumber may be available in considerably greater thicknesses.
Thick slabs and heavy planks can be used for:
- Dining tables
- Counters
- Benches
- Timber furniture
- Architectural features
Their actual dimensions vary significantly by supplier and manufacturing process.
Common Wood Plank Widths
Wood planks are available in many widths.
Common nominal widths include:
- 4 inches
- 6 inches
- 8 inches
- 10 inches
- 12 inches
- 14 inches
- 16 inches
- Wider specialty sizes
Wider planks can reduce the number of pieces required to cover a surface, but they may also be more prone to dimensional movement depending on the species, grain, moisture content, and construction method.
Wood Plank Lengths
Wood planks are sold in different lengths depending on the species and supplier.
Common construction lumber lengths include:
| Nominal Length | Approximate Length |
|---|---|
| 6 ft | 72 in |
| 8 ft | 96 in |
| 10 ft | 120 in |
| 12 ft | 144 in |
| 14 ft | 168 in |
| 16 ft | 192 in |
| 20 ft | 240 in |
Specialty hardwood planks and slabs can be available in different lengths.
When purchasing planks, select a length that minimizes waste while still allowing enough material for cuts and finishing.
Wood Plank Size in Inches and Millimeters
Woodworking and construction projects may use either imperial or metric measurements.
| Nominal Size | Approx. Actual Size | Approx. Metric Actual Size |
|---|---|---|
| 1 × 4 | ¾ × 3½ in | 19 × 89 mm |
| 1 × 6 | ¾ × 5½ in | 19 × 140 mm |
| 1 × 8 | ¾ × 7¼ in | 19 × 184 mm |
| 1 × 10 | ¾ × 9¼ in | 19 × 235 mm |
| 1 × 12 | ¾ × 11¼ in | 19 × 286 mm |
| 2 × 4 | 1½ × 3½ in | 38 × 89 mm |
| 2 × 6 | 1½ × 5½ in | 38 × 140 mm |
| 2 × 8 | 1½ × 7¼ in | 38 × 184 mm |
| 2 × 10 | 1½ × 9¼ in | 38 × 235 mm |
| 2 × 12 | 1½ × 11¼ in | 38 × 286 mm |
Metric values are approximate conversions and should not be treated as exact manufactured dimensions.
Types of Wood Planks
Wood planks can be classified according to the type of timber and manufacturing process.
Softwood Planks
Softwood planks are commonly manufactured from species such as pine, spruce, fir, and similar construction woods.
They are often selected for:
- Construction
- Shelving
- Furniture
- Wall projects
- Outdoor structures
Softwood is generally easy to cut and work with.
Hardwood Planks
Hardwood planks are made from species such as oak, maple, walnut, ash, and other hardwoods.
They are commonly used for:
- Furniture
- Flooring
- Countertops
- Tables
- Decorative projects
- Premium woodworking
Hardwood prices can vary significantly depending on species, grade, availability, and board dimensions.
Rough-Sawn Planks
Rough-sawn planks retain a textured surface from the sawing process.
They can be selected for:
- Rustic construction
- Landscaping
- Barn-style projects
- Decorative structures
- Timber features
Rough-sawn dimensions may differ from surfaced lumber dimensions.
Surfaced Wood Planks
Surfaced planks are machined to create smoother and more consistent surfaces.
They are convenient for:
- Furniture
- Shelving
- Interior projects
- Trim
- General woodworking
Wood Plank Size for Shelves
Shelf dimensions depend on the load, span, material, and support arrangement.
Common shelf plank widths include:
- 6 inches
- 8 inches
- 10 inches
- 12 inches
A thicker plank can provide greater stiffness, but thickness alone does not determine the maximum shelf span.
Shelf performance is also affected by:
- Wood species
- Plank grade
- Shelf length
- Load weight
- Support spacing
- Grain orientation
For long shelves carrying heavy objects, additional brackets or intermediate supports may be necessary.
Wood Plank Size for Tables
Tabletops are often made from multiple planks joined together or from wider solid slabs.
Common tabletop plank thicknesses may range from approximately ¾ inch to 1½ inches or more, depending on the design.
Factors to consider include:
- Table dimensions
- Support structure
- Wood species
- Plank width
- Moisture content
- Expected loads
- Movement across the grain
Wide solid wood planks can expand and contract with changes in moisture, so proper construction techniques are important.
Wood Plank Size for Decking
Decking boards are usually selected according to the deck design, joist spacing, exposure, and applicable requirements.
Common decking dimensions may include:
- Nominal 1 × 4
- Nominal 1 × 6
- Nominal 2 × 4
- Specialty decking dimensions
Outdoor decking material should be appropriate for moisture exposure and the expected environmental conditions.
Proper spacing between decking boards is also important because wood can expand and contract with changes in moisture.
Wood Plank Size for Flooring
Wood flooring is available in many thicknesses and widths.
Traditional solid wood flooring may use relatively narrow boards, while modern flooring can feature wider planks.
Flooring dimensions depend on:
- Installation method
- Wood species
- Subfloor
- Product design
- Moisture conditions
- Manufacturer specifications
The term “wood plank flooring” can also refer to engineered wood products, which may have completely different construction and dimensions from solid wood planks.
Wood Plank Size for Fencing
Fence planks are generally selected according to the desired fence height, appearance, wind exposure, and support structure.
Common plank widths include:
- 4 inches
- 6 inches
- 8 inches
- 10 inches
Thicker boards may be selected for heavier-duty or decorative fencing.
The supporting posts and rails are also important because the fence boards themselves do not provide the entire structural system.
Also Read:
Wood Plank Size for Wall Cladding
Wood planks can be used as interior or exterior wall cladding.
Typical considerations include:
- Plank width
- Thickness
- Installation direction
- Moisture exposure
- Ventilation
- Fastener type
- Wood species
Narrower boards can create a more traditional appearance, while wider planks can produce a simpler, more contemporary look.
Wood Plank Size and Load Capacity
A plank’s ability to support a load depends on more than its dimensions.
Important variables include:
- Thickness
- Width
- Span
- Wood species
- Grade
- Moisture content
- Support spacing
- Grain direction
- Load location
For example, a thicker shelf plank may resist bending better than a thinner plank, but increasing width does not automatically provide the same improvement in stiffness.
For structural applications, use an appropriate design method rather than relying on a basic plank-size chart.
Wood Plank Size and Wood Species
Different wood species have different physical characteristics.
Species can affect:
- Strength
- Hardness
- Density
- Stability
- Durability
- Appearance
- Workability
- Cost
For example, a hardwood plank and a softwood plank with identical dimensions may have different performance characteristics.
When selecting lumber for furniture or construction, consider species and grade together with dimensions.
Also Read:
Wood Plank Grade
Lumber grade describes characteristics such as knots, grain, defects, and structural quality.
A higher-grade plank may provide:
- Better appearance
- Fewer defects
- More consistent quality
- Better suitability for visible furniture
Construction-grade lumber may prioritize structural performance and availability rather than furniture-grade appearance.
The appropriate grade depends on the intended application.
Wood Plank Moisture Content
Moisture content is an important consideration when selecting and installing wood planks.
Wood naturally changes dimensions as its moisture content changes.
This can result in:
- Expansion
- Contraction
- Cupping
- Bowing
- Warping
- Gaps between planks
Indoor woodworking projects should use appropriately conditioned timber when possible, while outdoor projects should account for expected environmental moisture changes.
How to Measure a Wood Plank
Measuring a wood plank requires three primary dimensions.
Measure the Thickness
Place the measuring tool against the plank’s edge and measure from one surface to the opposite surface.
Measure the Width
Measure across the broad face of the plank.
Measure the Length
Measure from one end to the other.
Record the measurements separately.
For example:
Actual dimensions: ¾ × 7¼ × 96 inches
This can correspond approximately to a:
Nominal 1 × 8 × 8-foot plank
Wood Plank Size Comparison
The following chart compares several common nominal plank sizes.
| Nominal Size | Approx. Actual Thickness | Approx. Actual Width | Best Known For |
|---|---|---|---|
| 1 × 4 | ¾ in | 3½ in | Trim and narrow projects |
| 1 × 6 | ¾ in | 5½ in | Shelving and furniture |
| 1 × 8 | ¾ in | 7¼ in | Shelves and wall boards |
| 1 × 10 | ¾ in | 9¼ in | Wide shelves |
| 1 × 12 | ¾ in | 11¼ in | Furniture and wide shelves |
| 2 × 4 | 1½ in | 3½ in | Construction |
| 2 × 6 | 1½ in | 5½ in | Heavy shelving and projects |
| 2 × 8 | 1½ in | 7¼ in | Construction and woodworking |
| 2 × 10 | 1½ in | 9¼ in | Wide structural applications |
| 2 × 12 | 1½ in | 11¼ in | Heavy-duty projects |
How to Choose the Right Wood Plank Size
Choosing the correct plank starts with understanding the project’s requirements.
For Shelving
Consider the shelf length, expected load, support spacing, and desired appearance.
For Furniture
Consider thickness, species, grain, moisture content, and finished dimensions.
For Outdoor Projects
Consider moisture exposure, treatment, durability, and dimensional movement.
For Construction
Consider structural requirements, grade, span, loading, and applicable building requirements.
For Decorative Projects
Appearance may be just as important as strength. Wood species, grain pattern, knots, surface texture, and finish should all be considered.
Common Wood Plank Selection Mistakes
Several mistakes can create unnecessary problems during a woodworking or construction project.
Confusing Nominal and Actual Dimensions
A plank labeled 1 × 8 does not necessarily measure exactly 1 × 8 inches.
Ignoring Wood Movement
Solid wood expands and contracts with moisture changes.
Choosing Width Without Considering Stability
Very wide planks may behave differently from narrower boards, particularly when moisture conditions change.
Ignoring Grain Direction
Grain orientation can influence appearance, strength, and dimensional stability.
Buying the Wrong Length
Selecting very short planks may create unnecessary joints, while excessively long material can increase waste and handling difficulty.
Selecting Only by Appearance
A visually attractive plank may not have the appropriate structural properties for a load-bearing application.
Wood Plank Installation Tips
Proper installation helps improve the appearance and performance of wood plank projects.
Useful practices include:
- Measure actual plank dimensions before cutting.
- Allow wood to acclimate where appropriate.
- Inspect planks for defects.
- Plan grain direction before installation.
- Leave appropriate movement allowances where required.
- Use suitable fasteners.
- Protect exterior timber from excessive moisture.
- Seal or finish the wood according to the application.
- Avoid trapping water against outdoor planks.
For structural projects, follow the relevant construction specifications and professional design requirements.
Wood Plank Cost Factors
The price of a wood plank depends on several factors.
These can include:
- Wood species
- Dimensions
- Grade
- Length
- Moisture content
- Surface finish
- Treatment
- Availability
- Local market conditions
Hardwood planks are often more expensive than common softwood construction lumber, although prices vary significantly by species.
Wider and longer clear-grain boards can also command higher prices because large defect-free pieces may be more difficult to produce.
Wood Plank Size Chart by Application
| Application | Common Plank Sizes | Important Factors |
|---|---|---|
| Shelving | 1 × 6 to 1 × 12 | Span and load |
| Furniture | 1 × 6 to 2 × 12+ | Species and appearance |
| Tabletop | 1 × 6 to wider slabs | Movement and support |
| Wall cladding | 1 × 4 to 1 × 12 | Exposure and appearance |
| Fencing | 1 × 4 to 1 × 10 | Height and weather |
| Decking | Product-specific | Exposure and joist spacing |
| Workbench | 2 × 6 to 2 × 12+ | Load and stiffness |
| Construction | Various | Structural design |
These are general examples rather than universal requirements.
Wood Plank vs Wood Board
The terms plank and board can overlap.
A wood board is a general term for a piece of lumber with a rectangular cross-section, while wood plank often refers to a relatively wide or substantial board used for surfaces, construction, flooring, furniture, or decorative work.
There is no universal dimensional boundary that separates every plank from every board.
The terminology can vary among suppliers, manufacturers, trades, and regions.
Wood Plank vs Wood Beam
The primary difference is usually related to function.
A wood plank is often used as a surface, panel, shelf, furniture component, or relatively flat material.
A wood beam is specifically intended to carry structural loads across a span.
A plank may become part of a structural system, but a structural beam requires appropriate design based on loads, span, material properties, and support conditions.
Wood Plank FAQs
What are the standard sizes of wood planks?
Common lumber plank dimensions include nominal 1 × 4, 1 × 6, 1 × 8, 1 × 10, 1 × 12, and thicker 2-inch nominal products such as 2 × 6, 2 × 8, 2 × 10, and 2 × 12.
What is the actual size of a 1 × 8 wood plank?
A commonly surfaced nominal 1 × 8 plank measures approximately ¾ inch thick by 7¼ inches wide. Actual dimensions can vary by product.
What is the difference between a plank and a board?
The terms are often used interchangeably. In general usage, a plank may refer to a relatively wide or substantial piece of lumber, while board is a broader term.
What is the most common wood plank width?
Widths such as 4, 6, 8, 10, and 12 inches are commonly encountered, although availability varies by species, supplier, and lumber category.
What thickness should a wood plank be for shelving?
The appropriate thickness depends on shelf span, expected load, wood species, and support spacing. A thicker plank generally provides greater stiffness, but there is no universal thickness for every shelf.
Are wood plank sizes nominal or actual?
Wood products are commonly sold using nominal dimensions, while the finished physical dimensions are often smaller after drying and surfacing.
Can wood planks be used outdoors?
Yes. Wood planks are widely used outdoors for decking, fencing, siding, landscaping, and other applications. The timber should be suitable for the expected moisture and weather exposure.
**Do wider wood planks warp more?
Wide solid-wood planks can be more sensitive to dimensional movement across their width. Proper moisture control, species selection, grain considerations, and installation techniques can help manage movement.
What is the best wood plank for furniture?
The best plank depends on the furniture design, desired appearance, strength requirements, budget, and working properties. Hardwood species are commonly selected for many furniture applications, while softwoods can also be suitable.
How long are standard wood planks?
Construction lumber is commonly available in lengths such as 6, 8, 10, 12, 14, and 16 feet, while specialty lumber can be available in other lengths.
Final Thoughts
Understanding wood plank sizes makes it easier to select suitable lumber for construction, woodworking, furniture, shelving, flooring, fencing, and decorative projects. Common dimensions such as 1 × 4, 1 × 6, 1 × 8, 1 × 10, 1 × 12, 2 × 6, 2 × 8, and 2 × 12 cover many everyday applications.
However, dimensions are only one part of choosing the right wood plank. Species, grade, moisture content, grain, finish, intended use, span, load, and environmental conditions can all affect the final selection.
Always distinguish between nominal and actual dimensions, especially when precise measurements are needed. Measuring the physical plank before cutting or purchasing hardware can prevent many common mistakes.
For simple woodworking projects, a size chart can provide a useful starting point. For structural applications, use lumber with the appropriate grade and verify the design according to the relevant structural requirements.