The BIGGEST, Cushiest Inflatable Tub You'll Find! More comfortable, more room to grow! Our soft, jumbo tub keeps little ones secure, and the contoured headrest makes shampooing easy. Unique pockets keep bath supplies close, so you can keep one hand on baby. For babies who can sit up, up to 24 months. A One Step Ahead Exclusive!. More room to grow — measures 33"L x 23"W x 8½"H (outside length including flap: 37"L) . Inside space: 25"L x 14½"W x 7"H