15" x 15" Flexible Silicone Green Baseplate - The Brickmat is Compatible with Larger Size Blocks This 15" x 15" soft portable activity baseplate mat that is works with major brand blocks Engineered for easier removal of blocks for younger kids, we struck the balance of easy to press on and remove for younger builders Easy storage and travel ready, when flat at 15" x 15" this flexible mat is incredibly versatile and works great on activity tables This super soft silicone mat is a great addition or alternative to hard plastic base plates Bricks or accessories shown in picture(s) are not included