I bought one that was 16 by 22 inches that folded in the middle for "EASE" in carrying and storage. Well to make a long story short it broke right down the seam line. I got it taped together but when I measure more than 11 1/2 inches it's not quite accuric (misspelled). The lesson in this story. DON'T BUY A CUTTING MAT THAT FOLDS. That's my 2 cents worth.