Would you buy a piece of clothing that is a bit too large in places or a bit small in places?

So, let's say you're looking for good clothes and you finally find something that's nice, from a good material and doesn't look too bad, but the sizing is a bit off. If you takes a smaller size, it fits perfectly, except it's tight at one place (let's say a shirt with perfect sleeves, fits your torso except is tight at chest). If you take a larger size, you solve the tightness problem, but suddenly other parts are a bit large (shirt sleeves are large, shirt itself is wide, but your boobs fit).

You've been searching for ages and the piece doesn't look too bad, but you know it's not perfect. Which size would you buy if any and why?