4 piece 2" x 2" Green interlocking mats. Creates 16 square feet. More colors available at eWonderWorld storefront * Its ~9/16" of an inch thickness meets the minimum protection requirement for children. * Easy do-it-yourself interlocking mats. Lasts up to 5 years under proper care. * Made from non-recycled, non-toxic, light weight, durable, and high density EVA foam. * Due to the nature of foam production, colors may fluctuate slightly in various angles and/or lighting.