This Tadpoles 4-Piece Playmat Set provides a fun and safe environment for little ones to play on and have fun. The mats are made of soft EVA foam with a border on each side and are just like puzzle pieces because they interlock easily with one another to create a surface space of 48 x 48 . Two of them come in light grey and the remaining two in dark grey. These 24 foam playmats will add a nice touch to any child s bedroom or playroom. When not in use they are easy to store away.