A common plywood sheet measures 4 × 8 feet. For a small craft, a precut 2 × 4 panel may be easier to handle. Before you cut, check the thickness of the sheet you bought. A panel labeled ½ inch can measure closer to 15/32 inch.
Common plywood sheet sizes
| Sheet size (ft.) | Approximate size (cm) | Example use |
|---|---|---|
| 4 × 8 | 122 × 244 | Cabinet parts or sheathing when rated for the application |
| 5 × 5 | 152 × 152 | Furniture and cabinetry |
| 4 × 10 | 122 × 305 | Long panels where fewer seams are useful |
| 2 × 4 | 61 × 122 | Small crafts and repair patches |
Ask the supplier which precut sizes they stock and whether they can cut a full sheet to your measurements.
Nominal and actual plywood thickness
The nominal size is the label you shop by. Actual thickness varies by panel. APA gives examples of 15/32 inch (about 11.9 mm) for sheathing described as ½ inch and 23/32 inch (about 18.3 mm) for a floor panel described as ¾ inch. Measure your sheet before cutting a groove or fitting it against another panel. APA guidance on nominal thickness
Thin panels around ⅛ to ¼ inch can work for craft pieces and cabinet backs. For boxes, shelving, and furniture, choose a thickness that suits the load and the distance between supports. For floors, roofs, and walls, use panels with the grade and span rating specified for the job.
Mark and cut the sheet
Mark the cut line with a straightedge and support the sheet so it stays stable. Use a saw suitable for the job, follow its manual for setup and blade depth, wear eye protection, and keep your hands clear of the blade. See the home dimensions guides for other project measurements.