Okay so I'm looking at an alternative to Magnum XL's. FYI My girth (base): ~6" Midshaft: ~5.8" Head: ~4.5" (lol) So in inches: Magnum XL width: 2.59 (66mm) Regular condom: ~ 2" (52mm) Those are also base widths. Is it simply a matter of looking at your base width (because that's where the ring is and where the condom esentially 'fastens' itself) and comparing it to the condom? For example my base width is over 2". I think its about 2.25" but could be more, haven't checked in a while. Are there any thin/ultralite etc condoms that would fit my girth? Not finding many. Magnum XL's are great but the material is quite thick. Also I'm guessing that those are external widths and that the internal width of the condom will be less than the quoted width. Here are Pasante King Size: Length (mm) 200 Width at Head (mm) 60 Width at Base of Head (mm) 60 Width at Base (mm) 60 Nice uniform width there of 2.36 inches. Seems like they would fit but will they? Is there some sort of calculation or something that you could use to find the right condom?