I bought this white shirt for my 7 year old who wears 7/8, "8” or medium shirts. The sleeve length of this shirt was just right, although I turned up the cuff for a neater look. The shirt was barely long enough to tuck into his pants. Just in case she needs that shirt, the shirt should be tucked in. But with that said, she could always wear the shirt elsewhere and it would be shorter than the belt loops on her pants. My daughter is not skinny, but I would describe her as an "athletic figure". Like I said, this shirt fits. I considered swapping for the next size up but decided to keep it because the sleeve length would probably be too long. The darts on the back of this shirt give it a fitted look. What I like about this shirt is that it's not "tight". Hope that was helpful!
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