Chastity and orgasm denial discussion

Quick question: if a man wears a snug chastity cage around the clock for five years without ever being unclipped or reaching an orgasm, would his penis shrink because it never gets to stretch out during erections?

I’m wondering this personally. Since I’ll be locked in permanently, my penis won’t get released either, so I can’t tell if its erect dimensions will change on me. But I’d like to know whether they might…

I’ve always secretly preferred a smaller cock—even the tiniest possible would do; smaller is better.