This jumper is soooo soft, the colour is gorgeous. I purchased a large based on my height but i could have gone with a medium I think. It is thin enough that it should be easy enough to crop/tuck in if you want to, if wearing in winter e.g. 15 degrees Celsius you would have to wear a jacket as well. I've put my finger where my belly button is if that helps you work out the size, idk lmao.