I just needed some plain t shirts I didn’t care about for playing outside / daycare for my one year old. I basically bought them to get ruined so her cute clothes wouldn’t be. But they are actually really nice! Thick - not what I was expecting, these are good quality. They fit a lot like Burt’s Bees onesies - big, esp the neck part, which gets baggy. My baby is about 31 inches, 20 lbs and I got 18 months based on reviews saying to size up and also because I wanted them to fit her all summer (I bought them in April). I should have gotten her usual 12 months, they are pretty big on her, but they will definitely fit all summer now!