Learning Resources Base Ten Blocks Smart Pack Build math skills related to base 10 concepts Handy, smaller set perfect for small group or individual classroom instruction Supports Standards for Mathematical Practice according to CCSS Set of 121 (1 flat, 20 rods, 100 units) comes in a re-sealable polybag and includes activity guide Perfect for grades 1 and up.Bag measures 6 W x 9 H inches