hi all, i’m measuring up for a jailbird and need some advice, specifically base ring diameter and cage diameter.
i currently wear a spiral cage device that i purchased from a uk company.
the internal dims are (in millimetres)
base ring 45mm
cage 31mm
it’s causing edema after prolonged use and so i’m going custom
i have sourced some rings to help discern a reasonably accurate idea of what i’m going to need.
they are 31,34,40,45 & 50mm
i have had joy wearing the 50mm base ring, plenty of room for a finger to the first knuckle, although i think it may be 2mm over sized for me.
the 31 & 34 over the shaft are giving me problems with regards to choice
the 31 sits nicely behind my glans and doesn’t move, giving a slight indentation when taken off, the 34 can travel up and down a bit and no indentations when removed.
in the pics is (top to bottom)
50/34/31 rings.
obviously i want to order the cage as correctly as possible first time round.
so with that said what are people’s thoughts on a
base ring -
47.5mm/1&7/8”
cage diameter -
35mm/1&3/8” OR
32mm/1&1/4” ?
cage length i’m still working on.
i’m getting measurements of between
2” & 3&1/2” at various times.
gap i’m also not sure on, i was toying with 3/8” but wonder if 1/2” would be a better start. i have had the scrotum burn over night with this current device and writing now i can’t remember what the gap size is of this one. is bigger gap better?
any help or advice would be greatly received,
best regards Rob.
i currently wear a spiral cage device that i purchased from a uk company.
the internal dims are (in millimetres)
base ring 45mm
cage 31mm
it’s causing edema after prolonged use and so i’m going custom
i have sourced some rings to help discern a reasonably accurate idea of what i’m going to need.
they are 31,34,40,45 & 50mm
i have had joy wearing the 50mm base ring, plenty of room for a finger to the first knuckle, although i think it may be 2mm over sized for me.
the 31 & 34 over the shaft are giving me problems with regards to choice
the 31 sits nicely behind my glans and doesn’t move, giving a slight indentation when taken off, the 34 can travel up and down a bit and no indentations when removed.
in the pics is (top to bottom)
50/34/31 rings.

obviously i want to order the cage as correctly as possible first time round.
so with that said what are people’s thoughts on a
base ring -
47.5mm/1&7/8”
cage diameter -
35mm/1&3/8” OR
32mm/1&1/4” ?
cage length i’m still working on.
i’m getting measurements of between
2” & 3&1/2” at various times.
gap i’m also not sure on, i was toying with 3/8” but wonder if 1/2” would be a better start. i have had the scrotum burn over night with this current device and writing now i can’t remember what the gap size is of this one. is bigger gap better?
any help or advice would be greatly received,
best regards Rob.