How do you tell your man his condoms are to big....?

So me and my boyfriend have sex a few times a week sometimes we just pull out but when we use a condom I can tell they are to big and I’m kinda worried it’s gonna come out the top (happened to us before) but he’s really sensitive about the size of it and I don’t know how to say it without hurting him I don’t have a problem with the size but he thinks I do so I’m trying to not say it I don’t know how to but I also don’t wanna get knocked up (sorry for the run on sentence)