Thank you for your question to CWSA - the biggest and most prestigious wine and spirits competition in Hong Kong and China.
The inside core diameter of a roll of medals is ~7.6cm while the outside diameter is different in each medal:
Double Gold: ~12.2cm
Please note that these dimensions may be subject to change.
The striking CWSA Medal Stickers are available via here and are an essential part of your quality products marketing and sales...http://www.cwsa.org/sticker-shop/
Entries are now being accepted for the forthcoming CWSA competition via here... http://www.cwsa.org/enter/
Wishing you great success at CWSA and in the fastest growing wine and spirits market in the world!
Very best wishes,