The Thousand Chain Mat is one continuous piece of fabric (no seams!) long enough to lay out the Thousand Chain. So many Montessori students have only seen the Thousand Chain laid out in a spiral and have missed the dramatic impact of the length of the beads all in a row. 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. It may also be used partly unrolled for the other cubing chains. 30 feet 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.