I ordered the fins mainly due to the low price and very fast shipment. My son has in shoes size 33/34. His foot length was here but a bit too long for this fin size, because his toes already clearly centered looked out from the opening. The real problem was that the fins were probably made only for children with very wide feet. The black rubber was our son not nearly at the foot of, almost everywhere one centimeter was space. In water his fins were flown from the feet after the first movement. Personally, I find it even more enjoyable when the fins completely made of soft rubber. The blue fin front part is too hard and not flexible. My recommendation: You prefer to buy the orange fins, which probably everyone still knows from the past from the swimming lessons in the pool.