Arts and Entertainment What sizes do sanding belts come in? What sizes do sanding belts come in? Sanding belts are available in a variety of sizes from ¼” x 18” all the way up to 60” x 360” and beyond (popular sizes include 2 x 72, 2 x 42, 1 x 30, 2 x 48, 3 x 18, 4 x 36, and 4 x 24).