Don't know how she did it, but apparently it's possible to strap even the big ones.

These seems to deliver globally
https://www.weadultshop.com/collections/dog-dildos
Also saw some knotted dildoes in the o-ring harness. I guess if the material is soft enough you can squeeze it through.
Don't know how she did it, but apparently it's possible to strap even the big ones.

There are some rings that can be opened and securely close them back.
Whaaat? I have seen only solid ones so far. Happy to learn something new.