Not too big, not too small, the medium size is the easiest to use.
The yellow color is bright and seems to give you energy from your feet.

Product specifications

[Ring size] Free

[Motif] Approx. 16.9 x 13.3 x 13.4mm (length x width x height)

【 material 】K18 gold plated/epoxy resin

[Country of origin] Japan 🇯🇵

 *Estimated rubber replacement is 2 years (free replacement isherefrom)