Can an iPhone 6s case fit an iPhone 6?

I bought my best friend a customized phone case for when he graduates from basic training. It has one of our favorite nebulas on it. The case I got him was for a 6s because he upgraded before he left but I talked to his mother and she said he got the 6. I know the 6s is slightly larger by mm's. I'd hate for something to happen to his phone. Should I just order another case?

I don't know. I'm not your phone.

The 6s is a different thickness than the 6, so it really depends on the case. The difference is small enough that it might work, but it really depends on the case.

The size differences are very slim between them so in most cases it should be fine.