Tony,

We're close enough in size that my experiences may be relevant to you.

I've tried many of the generally available brands over the years and find that the regular Magnums fit nice on me (7"+ by 6"). I've never had a condom slip off me, normally since I put them on after I have gotten hard, and as long as I stay hard, the condom stays on.

I tried the Magnum XLs and found that they slid on my cock nice and easy, and did stay on, but had the potential for slippage if I didn't stay 100% hard.

If your girth is up to 6 inches, even regular condoms will probably fit well. I use Lifestyles Extra Sensitive, and even the inexpensive Class Act brands and they are
not tight enough on me to cause me discomfort.

Avoid brands that say 'contoured fit' or snugger or anything that may indicate they are narrower than regular condoms.

Condomania.com even has a wizard to help you pick the type that's best for you.
Good luck.

LapDog :P