This is a vintage Swarovski Signet Ring, a classic retro design from the brand. Style Type: Signet Rings are classic retro jewelry styles; this particular one is a vintage Swarovski piece from the 1990s to early 2000s. Wearing Effect: The ring features a wide signet design, giving it a powerful look when worn on the thumb. It's a unisex style and can be worn by both men and women. Main stone design: The cabochon uses a pavé setting technique, with multiple square-cut (princess cut) Swarovski crystals neatly arranged, presenting a dazzling full-diamond visual effect and maximizing its sparkle. It features a highly polished surface with a refined texture and excellent resistance to wear and tear. Size: The "M" marked in the picture corresponds to approximately European size 54-56 and US size 7, suitable for wearing on the thumb.