Special Features: Cushioning, waterproof, tear-resistant, puncture-resistant. We always want to ensure that our products fit the purpose and provide great value. Size:4×8″, 6×10″, 8.5×12″, 10.5×16″, 12×16″(usable size 4×7″, 6×9″, 8.5×11″,10.5×15″, 12×15″).