I have now re-appointed for the 2nd child the BEMA water wings, because they are simply very good. They are easy to put on, hold the child in the water, the child can not tilt forward or backward with it. Also, keep a long time. The size 0 matches (according to manufacturer) of 1 to 6 years. My 4 year old and 1-year fit this my water wings perfectly.
I hope my review was helpful to you and help you to make the right purchasing decision.