Oh wow the timing of this post. I got a fyjennicc HT V4cage standard size yesterday and tried it on today(first time) I found it fit nicely but I had to use the largest ring but it was no issue. Maybe its because I was getting excited but the cage was pulling away from my body I tried string which helped but it wasn't close enough. The lock however freaked me out. See one of the keys are not properly cut which lead to the key being able to be pulled out while in the unlocked state leaving the barrel lock still inside the cage. I thought I permalocked myself as a first timer but luckily the second key is fine broken key can be used if you wedge the cage and the ring to the perfect spot but its still too spooky for me. But yeah I got it for like 25 pounds which seems good especially for a starter device just the QA isn't where id likr it personally. Oh and BTW I got the clear one with sparkles it's super cute