Condom Fails

So I’ve been sleeping with this guy... Long story short every time he finishes he slips out of his condom and it sits there and his “specimen” leaks out. Not in me, but down my leg or onto the bed.

So does he need smaller condoms or something? I’m not sure what I’m supposed to do and I’m an extremely paranoid. I’m not pregnant because I took plan B and I’ve started since then. But it completely freaks me out and it’s happened twice now.

& if he needs smaller condoms how do I even bring that up to him.. I asked already and he was like “you know it’s one size fits all” which isn’t true. Ive looked it up.