36, 38, 42, 44/45, 48, 54, 58, 59, 60, 72, and 108 inches are the standard widths for fabric bolts, with 45, 54, and 60 inches being the most common. Typically, the width is indicated on a label located at the end of a flat fabric bolt.
Frequently, the quantity of fabric required for a project is determined by the width of the material, which is frequently specified in commercial patterns. In general, the wider the fabric, the smaller the quantity required. Be certain of the amount of fabric needed before the store clerk cuts it, as some patterns call for a single long piece instead of multiple shorter ones.