Flaccid Glans (Head) Width Supercanister Number
15/16″    (25mm) 26
1-3/32″ (27mm) 28
1-3/16″ (30mm) 30
1-5/16″ (33mm) 33
1-3/8″  (36mm) 36
1 -1/2″  (38mm) 38
1-9/16″ (40mm) 40
1-5/8″  (42mm) 42