Sand not included. Four corner seats each support up to 150 lbs.. Extend its use by converting it to a garden box when the kids have outgrown fun in the sand. Liner and cover are made with 100% polyester fabric with a water resistant coating. Holds approximately 850 lbs. of sand. Warranty: 30 days limited. Made from bamboo, wood and fabric. Made in China. Assembly required. Exterior: 53.5 in. L x 53.5 in. W x 10 in. H. Interior: 51 in. L x 51 in. W x 10 in. H. Overall: 55.5 in. L x 55.5 in. W x 12 in. H (37.4 lbs.).