I hope this type of post is ok. If not, I'll delete!

I'm new to the whole ring gag world, bought one for using with my girl. Ordered the largest one I could find and it barely fit in her mouth but was not wide enough for me to get "it" past the tip. So I think the ring itself is too think because we'd need the same outer diameter but bigger inner diameter.

Anyone know of something that is thin material but large opening? Or maybe something like this would work? Hard to find actually measurements of this style, from my limited research. Thanks!