Xtreme Mats Under Sink Bathroom Cabinet Mat, 21 5/8 x 18 7/8, Beige Fits cabinets with interior dimensions of 21 5/8 x 18 7/8 and larger; Water Sensor Sold Separately Holds 1.3 gallons of liquid in the event of a product spill or leak Perfect for inside sink base cabinets and under mini fridges Angled sides and rear wall ensure a snug fit, water sensor location on all mat designs Low-density polyethylene construction allows for flexibility and durability You have a leaky pipe Can&#039;t stop the water from leaking around your faucet or soap dispenser Your trash can is placed under your sink You store wet sponges or wash clothes under your sink You can no longer see the back of your cabinet You&#039;ve just remodeled your home You want your cabinet to last until you sell your home You&#039;re looking to sell your home Just bought a new home or vacation home Sidewalls of the mat flare out allowing for a snug fit.