I bought this set for my 5 yr old nephew and he LOVES it! He is small for his age but the mask/snorkel set fits perfectly. The fins are a little big for him, but I think they will work with some booties or heavy socks until his feet grow a bit more. There is still lots of room to adjust them once he does too! Additionally, I am extremely impressed with how well this product is made.

I bought this set for my son as we were heading to Mexico and i thought it would be fun to snorkel.
They arrived and i noticed that we received the 9-13 size though i ordered 2017 Small 1-3.
I planned to return them but didn't have time.
Regardless we took them and the fins fitted fine, they were at their tightest so that means there is room to grow.
The mask fit well though it did fog a little bit, not too big an issue and the "dry" snorkel worked pretty well.
The carry bag was really helpful and they were light and easy to pack in our bags.
All things considered its a great buy and we got the right size even if it wasn't what we ordered.
Not sure if that will help in choosing your size.
Best of luck with it

Its so great when everything fits and works right out of the box and my son is so happy with it. He loves the colors, there were good instructions and it's so adorable when he slings the bag over his shoulder and heads off to the pool. Everything fits back in the carry bag easily, there even room for some water shoes. Smart design on the bag, mesh lets it dry. The snorkel is very smart about not letting water in, the flippers snap on, the mask works well, it's a winner. For reference, he wears a size 1 sneaker and this just fits him. I think when his foot gets to size 2 we'll be too large but we will see.

Bought it for my grandaughter's birthday and she loves it. Very well made and sturdy. Especially like that flippers can be worn for several years as there is room for growth built in. She couldn't wait to use it! Very pleased with this product and would recommend it to others.

My 10 year old daughter just used this set in Belize. The snorkle guide said the mask and fins are as good as what the professional grade they use and the snorkle was better. My daughter and I snorkled all day..multiple days and she had no problem with the mask leaking or the fins and snorkle...while a few others, who rented eqipment, had mask and snorkle issues. I am very happy we bought this for our trip.