The purpose of this mat is to serve as a notification for when your sink leaks. It prevents water from sitting under your sink for long periods of time. This helps decrease the risk of mold, rot, and water damage. Easy to install, simply place the mat with the wall touching the backside of your cabinet. Easily trim the sides or front of the mat to fit your cabinet base. Rubber Channels help keep your under-sink items dry while the water flows from the leak point on the inside of your cabinetry - out. The back lip of the pan keeps the water from flowing to the back of your cabinet base and helps guide the water to move forward. Although the mat comes at a size of 34" L x 22" W x 0.25" H, customizable grooves make it easy to fit your kitchen cabinets or bathroom vanity. Note that when cutting, there should always be a groove wall on each side to ensure water does not flow over the side.