Oh, how lovely! Thank you so much. Image search shows that this thing is called a "ring resizer" or a "ring size adjuster" here. I learned something new!You have eagle eyes! I purchased them from Taobao.com but I am unsure whether the site ships to your country. This is the web link where I got mine. I've had this LC strap for a while and used to use it on other LC bags. The bigger clasps tend to scratch the hardware. As the hardware on this 3D is gunmetal, I did not want the scratches to be too prominent. Been using it with the silicon loop on and the clasps work fine. Nothing gets stuck.
I had included some pictures for you to do a picture search. It might be easier for you that way.
I'm wondering if I should get some for my 3D tote since it is gunmetal hardware too...does it only happen if you use a non-gunmetal strap?