Bathroom Anti-Slip Granite 21" x 24" Anti-Bacterial Toilet Floor Mats Both urine and leaking water can cause slippery surfaces and foul odors. These toilet mats provide traction and a dry surface for patrons to comfortably stand on without fear of slipping or having their shoes absorb any liquids. Urine can often cause tile floors to erode; these restroom mats have an anti-microbial agent that helps prevent any erosion from occurring. Outside dimensions of these toilet mats are 21" x 24" while the inside dimensions are 10.5" x 13"