This FloorComfort Fan Fold Foam Flooring Underlayment provides 100 square feet of moisture-resistant cushioning under laminate, hardwood, or engineered wood floors. The fan-fold design makes it easy to handle and install. Dimensions are 4'W x 25'L x 2mm thick. Item is like new in its original packaging with no damage. Model #A61940. A reliable, cost-effective underlayment solution for your next flooring project.