Your Weight Has Changed
Whether you've been hitting the gym hard or simply letting yourself go, bodily changes happen, and when they do — your wardrobe has to adjust accordingly. This can be a costly problem when it comes to tailored clothing, since it's no problem for it to be taken in, but having it let out can be costly, and sometimes not even possible.
So the lesson here is probably just lay off the carbs and hit the gym a little bit more. After all, if you're gonna drop serious dough on a good wardrobe, you should at least make sure your body can still fit into it.