We Sell Mats 3/8" Thick Interlocking Foam Floor Mats Light-duty padding made from non-toxic EVA foam Each tile measures 24" x 24" and is 3/8" (10mm) thick Each tile comes with two detachable border pieces, allowing you to finish your assembly with a straight edge Assembles in just minutes over any hard, flat indoor surface - assembly over carpet is not recommended Can be assembled as whole tiles or you can easily trim tiles for wall-to-wall installations