The Condomerie® also sells condoms for men who need a larger or smaller size. Circumference Omtrek, CAS 0 = CAS 1 = CAS 2 = CAS 3 = CAS 4 = CAS 5. Mar 15, - The most important measurement for picking a condom is girth, not length. Length: 6 to 7 inches. Width: to 2 inches Length: 7 to inches the guesswork out of it, condom company One gives you 60 sizes to choose.