Mature Metal discussion

I’m exploring the option of getting a Jailbird. Right now I wear an Halden-XS (it has a large spacer, with a 2-inch ring and 1-inch length), but it comes off accidentally while sleeping because my penis tends to retract into the scrotum area.

Considering this setup: Ring Style OvalCage Length 1 1/2”LengthRing Size 1 3/4” RingCage Diameter 1 1/4” Dia.Lock Options Padlock fit (no padlock inc.)Second Pin NoneThird Pin NoneCage/Ring Gap 1/4” Gap

Would that be suitable? Also, what distinguishes the ring style options?

Thanks