Drywall length and width generally works on the "four foot unit" system. So, widths and lengths will typically be a multiple of four feet. Code does not dictate drywall length and width; these are determined by the needs of the builder, architect, and client. Code does dictate some drywall thicknesses, though.
| Dimension | Details |
| Width | 4' |
| Length | Length ranges from 8' to 16'. |
| Thickness | From 1/4" to 5/8". Thickness is variable and often code-related. For example, code requires that thicker Type X drywall be installed on garage walls that are adjacent to the house. See below for details. |