I always check the reviews on the fit of these items, because sadly you can't return orders from Germany - but Passenger and their costumers don't disappoint!
I don't like an oversize fit so I ordered this in XS (I wear a UK8/EU36 in tops) after reading the other reviews. It fits perfectly! It's not super fitted or snug, I can still wear a long sleeve shirt underneath. I'm also very short (5ft2/1.57m) and these hoodies tend to look huge on me, but not this one. I covers my butt and it's so soft, the material is great, even though I'm not a huge fan of polyester fleece. It definitely keeps you warm! The colours are just like on the pictures as well! I'd say, if you want to wear a sweater underneath or like a more comfy/oversize look, just order your normal size.