Waters might be rising, but you're holding the line thanks to these top-quality U.S. Military Sand Bags. Each polyurethane Bag is 16.5" x 27"h. Attached tie-closure string. Made to strict U.S. military specs, the same ones used for disaster preparedness by relief agencies. Polyurethane Bags Tie string closure White ties and stitching 16.5" x 27" each Sand not included