Bought it last October and used it for about 3 days on my thumb♪ I thought it was great for measuring sleep quality at night, but I don't usually wear rings at all, so I stopped because it was uncomfortable to sleep with the ring on♪ (I think I'm just too sensitive♪) Size 11 (see photo 9♪) Black smart ring. - Brand: b.ring - Color: Black - Accessories: Charging cable, instruction manual, ring size measuring kit - Model name: b.ring - Features: LED indicator Thank you for looking.