If you have a corner sink base cabinet in your kitchen or bathroom, please see the diagrams below. Some corner cabinets make a 90 degree angle in the back and some are clipped; both options are shown. The best way to protect your corner sink base cabinet would be using one of the 2 options shown below. Xtreme Mats offers two cabinet mats depths. Our kitchen depth is 22 1/4" and vanity depth is 19 1/4" at their max expansion. Both kitchen and bathroom depth mats can be used in either orientation. You will need to take a look at all sizes of mats we offer and see what configuration would work best for you to protect against a plumbing leak from your valves, p-trap, garbage disposal or reverse osmosis filters. 

A kitchen mat is deeper than a vanity mat so you can get more coverage front to back but less coverage left to right as shown above.

A vanity mat is more shallow than a kitchen mat so you get more width coverage from left to right.