PROSOURCEFIT Thick Exercise Puzzle Mat Black 24 in. x 24 in. x 0.75 in. EVA Foam Interlocking Anti-Fatigue (6-pack) (24 sq. ft.) ps-2997-extp-black - The Home Depot
Amazon.com: Puzzle Mat Roll up Jigsaw Puzzle Pad Puzzle Storage Felt Mat Puzzles Saver (35.6" x 24.1") - Fits up to 1000 Pieces : Toys & Games