We Sell Mats Martial Arts Tatami Foam Exercise Mats This item by We Sell Mats comes with (9), 40"x40" tiles plus borders This item by We Sell Mats comes with (9), 40"x40" tiles plus borders This item will cover 100 square feet or an area 10' x 10' The Extra Large 40"x40" tiles provides easier installation and less seams Provides a cushion to hard floor surfaces for Martial Arts, exercise rooms, Pilates, Yoga and more