These swimmers look very cute. However, I ordered a large - I am usually a size 12-14 and I’m quite short (5 ft 2) and they are very tight vertically. You couldn’t be any taller, they wouldn’t fit! I would probably like a bit more give in them even for myself. So I would recommend sizing up, and only getting these ones if you’re a short person 🙂 The feeding access is great, very handy.