Just big enough to catch all splash back but small enough to fit nearly any urinal. Big size??7.5*6.7 inch??Small size:7.1*6.3 inch. These pads will work in 99.9% of situations. Keep your bathroom clean and smelling fresh with a urinal mat to absorb it. Keeps the impact to a minimum to reduce uncleanly splatter to keep all the business in the urinal and not onto the bathroom floor.Great for keeping your bathroom smelling good for up to 30 days. Prevent your bathroom from developing that distasteful smell as these mats absorb most of the scent.During these important times where cleanliness is important, every little bit of germ control goes a long way to protect everyone.