Condoms for smaller penises?

Hi lovelies!
Can any of you recommend condoms for small penises? The guy I'm sleeping with is about 1.5-2inches when not erect (obviously I don't care and this is not a deal breaker). The condoms we used were Durex Extra Safe and they kept on slipping off. I would prefer the brand to be durex but am open to suggestions! 
Thank you!xx