26.5 quart Weathertight storage boxes make organizing simple and easy. Grooves on the lid are designed to stack multiple of storage bins securely to maximize limited storage space and create a customized storage solution. Stacking grooves also allow boxes to lock in place and prevent shifting. Dimensions: 19.55""L x 15.56""W x 7.99""H -- Inside Dimensions: 17""L x 13.5""W x 6.13""H