When I bought it they didn’t have in XS so I bought it in 2XS which is my size anyway (UK 6) despite the other reviews that say runs small. At first I thought -will I be able to breathe...?- but not long after I’m feeling it really perfect. It is hugging, not restricting, (and I really hate wearing tight garments). This one I love. If your breasts are too squashed you can open the two pockets. And if your waist is suffering you can undo the zip from the bottom a bit. The upper body and the sleeves are spacious. The sleeves, generally too short for me are perfect in this one. But there is no doubt: if you are in between sizes go up, not down. Like the very helpful review I read the pants are the opposite: they run large. So I bought an XS because I’m XS-S in pants. The XS is perfect. So I have this beautiful tracksuit in burgundy. Great fabric, I really like it. I would like it in a bright colour too, a scarlet or a royal blue.

Be aware the top runs small, I am usually a S to M, but saw other reviews noting the sizing was off. Still very nice indeed!