These cat rings are collaboration works
with " smile ball " of smile_mammy
and " miaow " of s'hteettibbar ⇔ rabbitteeth's
Please check the page of " s'hteettibbar ⇔ rabbitteeth's " too.
miaow with a smile
https://jp.pinkoi.com/product/1jIYSwZp
miaow with a glittering grin
https://jp.pinkoi.com/product/1i5Wijmv
max thickness 3.5mm ( 0.14inch )
max width 9mm ( 0.35inch )
material silver 925