Offex OFX-289015-FF 36'' x 48'' Big and Tall Carpet Chairmat with Lip Ideal for Multi-Shift Use. Designed for Medium - High Pile Carpet. Scuff and Slip Resistant Textured Top Surface. Studded Gripper Back. Straight Edge. Lip Size: 19"W x 9.75"L, Limited Lifetime Warranty. Weight Capacity: 400 lbs. Rated to hold up to 400 lbs.