"Children will love stacking these transparent ice blocks to make towers, castles and igloos. Set of 20 Pieces. *Endless opportunities for creative building and imaginative play *These ice blocks are super shiny and lightweight *Each block measures 8"L x 4"W x 2-3/4"H *Blocks are a sparkling shade of turquoise *A great addition to your building blocks area *Made of PETG (Polyethylene terephthalate) plastic"