Ordered my 10 year old size 10-12 and too small.
I thought a 12-14 would be too big for my average height kid (about 4ft tall and 70lbs), but the larger size was perfect. Don't try to adjust the straps quickly! But at least they don't slip, I guess that's the point! Good thick material, otherwise fits well, she says it's comfortable and she's quite picky!
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