Specifications: Sizes: Small (3"" x 4.75"" x 9"") and Large (4"" x 6"" x 9"") Naturally antimicrobial and water-resistant Blocks sold individually Materials: The perfect yoga props- made with sustainably harvested cork in Portugal from the bark of native cork trees- a rapidly renewable resource Uses: Cork provides extreme comfort, strength, and stability, offers firm support for your yoga practice Firm support for your yoga practice