The Hundred Chain Mat accommodates all the squaring chains and the 1 – 4 cubing chains, as well as the Hundred Chain. A must for the Montessori classroom! This superior quality mat is made in the USA out of a soft, 100% poly-fleece; it is durable and rolls up neatly for storage. Machine wash and dry. 36" long x 9½" wide. Save when you purchase the Set of 3 Bead Chain Mats (X706). Please note: Before ordering, be sure to measure your Bead Chains because sets vary in length.