DAFA Professional Self-Healing, Compact Folding Cutting Mat, Rotary Blade Compatible, A1 (36x24), A2 (24x18) Sizes. Introductory Sale! (A2 (24 x 18)) Professional-quality mat has inches grid lines & angles PLEASE NOTE: A1 Size folds into thirds, A2 Size folds in half (see images) Compatible with all brands of rotary cutters. Great to take to Sewing Class with You. Self-healing finish reseals surface cuts, providing a continually smooth surface for all cutting projects. 3mm, 3-ply construction for heavy duty cutting. Our heavy duty mats resist curling and warping.