Walnut S4S Lumber

Dimensional lumber is commonly used in construction, woodworking, and furniture making. It’s pre-cut to standard sizes and kiln-dried for stability, making it ideal for framing, shelving, cabinetry, trim work, and DIY projects.

Popular applications include:

• Wall and roof framing
• Furniture building (tables, benches, and shelves)
• Interior and exterior trim and moldings
• Custom woodworking and home improvement projects

Common dimensional lumber sizes include:

1x4, 1x6, 2x4, 2x6, 4x4, and more — where the first number is the thickness and the second is the width in inches (before surfacing).

Grit refers to the coarseness of sandpaper used to smooth the wood surface. Here's what each level does:

• 60: Very coarse. Removes heavy saw marks, rough textures, or slight warping. Best for aggressive material removal or initial flattening.
• 80: Medium coarse. Smooths out rough-sawn lumber while preserving thickness. A great starting point for most woodworking projects.
• 120: Fine. Leaves a cleaner surface ready for finish sanding or staining. Best used after 80 grit for that smooth, touch-ready feel.

Each level of sanding helps get your lumber closer to finish-ready. If you're not sure where to start, 80 grit is the most balanced option — ideal for most shop projects.

S4S stands for “surfaced on four sides.” This means the lumber has been planed smooth on all four faces—two edges and two faces—so it's straight, square, and ready to use without additional milling.

A linear foot is a measurement of length. One linear foot equals 12 inches in a straight line. When you buy lumber by the linear foot, you're paying based on the length of the board only, regardless of width or thickness.

Buying lumber by the board means purchasing individual boards with set dimensions. Each board is priced as a single unit based on its listed size—great for small projects or when you need a specific piece.

A board foot is a measurement of volume used for lumber. One board foot equals 12 inches long by 12 inches wide by 1 inch thick.

To calculate board feet:

(Length in inches × Width × Thickness) ÷ 12 = Board Feet

This method is commonly used for pricing rough-cut or custom-milled wood.

Try our board foot calculator: Board foot calculator

A square foot is a unit of area measurement equal to a square that is 12 inches long by 12 inches wide. It’s commonly used in construction, real estate, and woodworking to measure the size of surfaces like floors, walls, countertops, and tabletops.

1 square foot = 12 inches x 12 inches = 144 square inches

You can calculate square footage by multiplying length × width (in feet). For example, a board that is 2 feet long and 3 feet wide is 6 square feet (2 x 3 = 6 sq ft).

When boards are described as milled true to size, it means the actual dimensions of the lumber match the listed size. For example, a board labeled as 1" thick is exactly 1" thick — not nominal like standard construction lumber. This ensures precision for fine woodworking, cabinetry, and custom projects where accurate measurements matter.

We ship based on the size and weight of your orders:

• Small - Medium orders: (typically under 6 feet long or under ~70 lbs) ship via ground parcel services like UPS or FedEx. These arrive right to your door with standard delivery.
• Large Orders: (longer, heavier, or full bundles) are shipped via freight carriers. Freight shipments are delivered curbside on a pallet, and may require someone to be present to unload.

We carefully package all lumber to prevent damage during transit.