(guy)Please god condom help needed.

Please don't hate me for being male I just needed a calander for my cupcakes blood leakage

So I have been having very rough and intimate sex with my partner for about 4 months now and I cannot find a condom that fits me without it sliding off during. It is so bad that I almost never use one unless we do anal.

My measurements:

Length: 7.5"

Girth: 4"

Please ladies I'm young and I need help