Charm measures 17mm in diameter. The back of this item can be engraved for an additional cost. Learn more about engraving here. .925 Sterling Silver Customizing with a symbol? Please use code from symbol library to indicate placement of the symbol. Ex: Rose Jack = Rose (A1) Jack Note: Please allow up to five (5) business days for your personalized item to ship. If you prefer your non-engraved items be shipped immediately, please indicate that in the Order Notes at checkout; otherwise, your entire order will be held and shipped complete when engraving items are ready.