Transform your bathroom with a beautiful granite vanity top with attached under-mount porcelain sink. Perfect for quick and easy remodels Obtain the beauty and durability of natural granite without hiring a professional. This granite top is easy to install and fits directly on top of any standard 36 in. vanity cabinet. The granite top is 37 in. length, 22 in. deep and 0.75 in. thick. Granite is a natural material and slight variations in color may occur and are natural.