If there is not particularly suitable one, you can try using double-sided tape to help it better secure to your ring. Adopting a slanted opening to prevent the ring adjuster from falling off.
16PCS Ring Size Adjuster Invisible Clear Ring Sizer Guards Jewelry Fit Reducer Specifications:100% Brand new and high qualityMaterial: PlasticColor: ClearSize: 0.2*3.9inApplication: Ring Size Adjuster Description:REDUCE RING SIZE: Totally 4 Sizes in One Pack, Reduce Ring Size 0.5-2 Size, Perfect ring…