Three inch does not fit

It would be helpful if the vendor gave some sort of idea as to what size would fit. The 3" might fit a toddler, but I'm not sure who else that would fit. I had ordered the 3" but, of course, they don't fit so I'll need to get the 5". I will probably check in some local stores to see if I can find these or something equivalent so that I don't need to order a new size.

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