Tiffany 【Vintage】 Ring Knife Edge Ring #11.5 (approximately size 11.5) 750 Yellow Gold Ring width: 5.7mm Weight: Approximately 6.2g This item was purchased from a reuse shop after being newly polished. I've decided to sell it because I'm reconsidering its balance with my other items. I only tried it on after purchasing. The shop provided a gem certificate at the time of purchase, so I will include it for those who wish, after redacting the name section.