ModDotz high fired glazed porcelain penny rounds are fresh and modern, but with a nod to retro style. This porcelain has a very low moisture absorption rate and is great for indoor and outdoor use including wet areas. They're great on floors and walls and have been most popular in bathrooms, kitchens and swimming pools. ModDotz porcelain dots measure 18mm and come mesh mounted on sheets which measure 11.9" x 11.5" or 0.953 sq.ft. To calculate the number of sheets needed for your installation, divide your square footage by 0.953.