03-07-2012, 11:17 PM
My kids are the same they are 9 and 11. I purchased swim fins for them in youth size. You can get them at Dicks Sporting goods, Sports authority, and others. They come in different sizes so be sure to take the kids along to size them up. My son has a set of sixe 3 I believe. My wife has small feet too and she loves them. To help keep them on their feet I punched a hole in the heel and put a fin keeper on them that straps around their ankles.
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