Make an everlasting memory with this customized fingerprint butterfly necklace. 10k yellow gold-plated sterling silver your fingerprint appears on the front of the butterfly-shaped pendant — provided by you and expertly transferred using modern technology your message is engraved on the back 28. 8mm x 30mm 18-inch rope chain; spring ring clasp please follow these steps: 1) place your order; 2) text your fingerprint photo from your smartphone to (330) 435-8997; and 3) when prompted, please respond with your order confirmation #. Standard text messaging rates may apply.