update
I’ve a passion for Sexshop and keep looking for more info. Today, I checked if I could find more info by entering ‘clit ring’ in Google and found this:
The reason for buying the small but plug was I had also been instructed to buy a glans ring from steel pleasures!! … this goes over the head of the penis(ie glans!!!) and has screws which tighten in and if you clit starts to get any thicker it presses into flesh….
Not exactly what I was looking for, but still a interesting read.