Chastity device discussions and reviews discussion

Hello, I’m considering getting a PA and chatted with my piercer, who mentioned they usually use a standard 10 gauge for this. Since we use the metric system, it seems like the gauge numbering is different here, but I haven’t been able to locate a conversion chart. I don’t currently have one of these devices in mind, though I’m leaning towards the Contender with the PA option added. Any thoughts from those who already have them would be great. Dianne