Here's a size guide (size chart) to help you select the right size. You will also find this size guide on the product page under "Sizing". 

Erect penis circumference
Under 5" | Size Slender
5-6" | Size Regular
Over 6" | Size Thicker

Flaccid penis circumference
Under 4" | Size Slender
4-5" | Size Regular
Over 5" | Size Thicker

Not sure? Choose Regular.

If you’re not sure of your size, we suggest Regular, as this fits most men. And no need to worry - we’ll send you a free replacement if you need something a bit bigger or smaller. And size changes are "no-hassle". There's no need to return the original. We simply send you the replacement. 

For the exact dimensions of the Xialla ring, click here.