IKEA Dralla Flexible Cutting Mats (Capitol Hill)
14.75" L x 11.75" H. 3 mm thick. These are well used. Crack in the red one. I wouldn't recommend using these for food preparation, there are little plastic bits peeling off. But I wanted to post these in case anyone can think of a way to re-purpose them, I don't think they can go in recycling.