Once you reach 7 inches the chart says 1J or 1C etc. But there is no J or C in the size selection to buy. You get huge shoes! So your 4 year old will have to wait 4 years to fit. THESE SHOES ARE TOO EXPENSIVE TO HAVE THIS SIZING SYSTEM. At the same time I bought water shoes from another company. They had a simple size grid. In the chart shown at the purchase selection, inches gradually corresponded to a size, and her shoes fitted perfectly. OOOOO very disappointed.
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