The Eva Exercise Puzzle Mat allows you to piece together a protective floor for gym, martial arts training, house, camping, or even outdoors, make a small house of tiles for pets, .The foam mat tiles provide an impact-absorbing space for working out, Slip Resistance and a durable surface for equipment. The 4 pieces or tiles make 1 meter in width and height with double faced colors ,one blue from one side and red from the other side , except for 0.62 Inch Thickness which has only one side color either blue or red. Each Package can be chosen among 5 different thicknesses according to your preferences.