Purchased for our grandson who is almost 4 yrs old for use in our pool. When they arrived they looked like they might be to big, but that was not the case. They are flexible and with the adjustable strap, fits nicely, good suction around eyes, very comfortable, he will be able to use for a few years. He told us when we put them on him that Michael Phelps wears Speedo googles. We highly recommend!