Sizing Is Off

I took all of my daughter's measurements, & ordered her a medium because that's what the size chart said she should wear. She should even have room to spare as her measurements were in the middle of the range for all of them. I'll be shocked if she gets to wear them for a month, they're so small. Given that I took all of her measurements, they're in inches & not some random made-up size, &, according to the manufacturer's size chart, she should even have a little extra room to grow, I'm not pleased. I bought 3 from GK & will probably have to spend another $75 on the next size up very soon... Other than that, the leos are nice.