Blue Topaz Silver Half Moon Ring, 925 Sterling Silver, Handmade Jewelry, Women Silver Ring, Gift For Her. Stone Color : Blue Stone Shape : Round Stone Size : 4x4mm weight : 2.5g Gemstone Silver Ring: This will be the perfect gift for your partner. You can enjoy the beautiful handmade ring and authentic silver. Our jewelry is JEWELRY FOR U Occasion: Birthday gift, Valentine's Day Gift, Anniversary Gift, Wedding Gift, Engagement Gift, Christmas Gift, Gift For Her, Gift For mom, graduation gift, New Year Gift, Thanksgiving Gift, Housewarming Gift. Size guide: Size 5 - diameter 15.7 mm Size 5.5 - diameter 16.1 mm Size 6- diameter 16.5 mm Size 6.5 - diameter 16.92 mm Size 7 - diameter 17.3 mm Size 7.5 - diameter 17.75 mm Size 8 - diameter 18.2 mm Size 8.5 - diameter 18.53mm Size 9 - diameter 18.9 mm Size 9.5 - diameter 19.41 mm Size 10 - diameter 19.84 mm Size 10.5 - diameter 20.2 mm Size 11 - diameter 20.68 mm