I’m a size 12-14 in jumpers as I have long arms, bought a L in this hoody for a bit of a looser fit, it was too big for me and hung right over my fingers. I’d buy a M next time for this one, I was going to exchange it but my boyfriend tried it on and it fit like a glove (while not too tight either) so I guess we will have matching hoodies haha. It’s very soft and the hoody is a nice comfortable fit.