Sagami 0.01 simply don't fit the average westerner. They are thin but are stupidly tight and only go down half your dick when fully rolled down. I think they're about 36mm wide and 101mm long. 4inches long! Er.
Most Durex are around 52 wide and approx. 7 inches long. Condoms are rarely longer than 8 inches.
Sagami original large size are 38mm and 170mm which is 6.6 inches long. These are polyurethane and don't stretch much though. I'm still in the process of finding the perfect condom but I find heat conductivity is important.
What I do know is that those Durex Extra Safe condoms are like a shot of lidocaine in the bell end. Probably needed given how toothy some girls are. An ex had a slight gap in her front teeth, which I thought very cute, until she caught my frenulum with it.
Anyone tried Crown Skinless, the pink condoms used in adult films? Those are next on my list to try.