Wonderful set consists of 26 soft colorful tiles, each with the same letter of the alphabet in English Braille. Designed to teach the English alphabet as well as Braille, it can also be used to sensitize the user to their peers with special needs. Made from 100% natural rubber foam (not synthetic rubber). Not only is natural rubber flexible and durable, it is also anti-microbial, dust mite resistant, mildew resistant, hypoallergenic, and flame retardant. Guaranteed to delight imagination and leave a minimal impact on the environment. Individually, the Braille Blocks are 1-1/2”W x 3-1/2”L.