Xtreme Mats Under Sink Bathroom Cabinet Mat, 27 3/8 X 18 1/2, Black Size: 27" 3/8 W x 18" 1/2 D x 3/4" H Holds 1. 7 gallons of liquid in the event of a product spill or leak Modern style and design, no vow or off-gassing Angled sides and rear wall ensure a snug fit, water sensor location on all mat designs