fit as a fiddle

例句：

1. 1.She had to buy a new dress that fit perfectly.
   她不得不买一件新裙子，合身极了。
2. 2. The shoes fit as a fiddle, and I'm glad I got them.
   鞋子合脚，我很高兴买了它们。
3. 3. He was so happy that his clothes fit as a fiddle.
   他非常高兴，因为他的衣服非常适合他。