Difficulties with wearing a device? discussion

I’ve got an Amazon steel lock on right now, and it’s hands down the comfiest one I own. Keeping it on during waking hours while taking it off at night lets me stay locked for about 16 to 17 hours daily without missing a beat—I can even exercise. Sleeping with it is still a no-go for me.

However, as time passes, my scrotum seems to settle lower. The 45mm ring on the back has dropped down enough that if I shrink up (from showers, hot tubs, or being outdoors), there’s a genuine risk of slipping out through the rear opening.

I do own a 40mm ring as an alternative, but previously wearing it was quite painful due to excessive chafing.

It seems like trying this new option is worth it. My main question revolves around sizing for when I eventually get a custom device: how should you approach the measurement? If your size fluctuates between two options, what’s the best way to decide? Would buying two rings make sense in that scenario? What are your thoughts?