The most likely size for the Steins;Gate lab member badge is about 56 mm across, which is a common listing for Steins;Gate tin badges. Another listing for a Steins;Gate badge product shows package dimensions of 6 cm × 5.8 cm × 2 cm, but that appears to be the packaging rather than the badge itself.

What to use

  • For the badge face itself , 56 mm diameter is the best match from the product listings I found.
  • If you mean the boxed item , one listing gives 6 cm × 5.8 cm × 2 cm.

Quick note

Different Steins;Gate badge listings can vary by manufacturer and version, so the exact dimensions depend on which badge you mean.

If you want, I can help identify the size of a specific Steins;Gate badge from a product photo or listing title.