The Planet Wise Swim/Diaper Bag has gone through vigorous testing to make sure it is the perfect size! This bag is a perfect solution for swim lessons, going to the beach, or to be used as a simple diaper bag that is WASHABLE!! The inside of the bag is large enough to fit two large swim towels plus clothes and accessories. With a large hidden zippered patent pending no-leak "wet" anti-microbial section on the inside, you can store your wet swim suit (and towels - yes it is BIG!) while keeping the rest of your clothes and other items dry. The best part, you can wipe it clean if needed or wash this bag right along with your clothes. This is a must have item for any busy parent carting little ones around to swim lessons. Dimensions 19"x15"x8".