$25.00. Foam blocks help increase the level of balance difficulty for home exercises. The inexpensive price makes it an easy addition for building better balance at home. The use of 2 foam blocks increases the number of ways foam can be added to your exercises. NOTE: Product is porous and designed for use at home, not among multiple individuals in clinic or gym settings. Purchase includes 2 blocks of 10 in. x 20 in. x 2 in. foam.