You do not use the verb suit if clothes are simply not the right size for you. The verb you need is fit. The size 12 gown was gorgeousand fitted perfectly... The gloves didn't fit. You can say that something suits a person or place if it looks attractive on that person or in that place. It is really feminine and pretty and it certainly suits you. However, you cannot usually say that one colour, pattern, or object suits another. The verb you need is match. She wears a straw hat with a yellow ribbon to match her yellow cheesecloth dress... His clothes don't quite match.

表示衣服的尺码是否合适不用 suit，应该用 fit，如：The size 12 gown was gorgeous and fitted perfectly (那件 12 码的礼服看上去光彩夺目，而且大小正合适)，The gloves didn't fit (手套大小不合适)。可用 suit 来表示某物穿在某人身上或放在某处非常漂亮，如：It is really feminine and pretty and it certainly suits you (它真是又漂亮又有女人味，你穿上去一定好看)。然而通常不能用 suit 来表示颜色、图形或物件或其他事物相匹配，此时应该用的动词为 match，如：She wears a straw hat with a yellow ribbon to match her yellow cheesecloth dress (她戴了一顶缀黄丝带的草帽来搭配黄色的薄纱连衣裙)，His clothes don't quite match (他的着装不是很搭)。