be similar to后面如果是在某个方面相似应该用in还是at还是with?

问题描述:

be similar to后面如果是在某个方面相似应该用in还是at还是with?
His coat is similar to mine _____ size.
用in还是at还是with?
with应该是不对的……

be similar to sb/sth. in ...
in...也可以放在to sb/sth. 的前面