used when you are making a criticism or complaint, to make it less likely to offend someone

I'm just saying I think it could have been done a little more carefully, that's all. 我不过说一下我觉得这件事可以处理得更谨慎，仅此而已。

Isn't it a bit small for you? Just saying. 对你来说是不是太小了？我只是说一下。