All rings are U.S.A size rings. Please look at photo of chart for the equivalent international sizes. IF YOU ARE NOT SURE OF YOUR SIZE. YOU CAN MEASURE YOUR RING SIZE AT WWW.FINDMYRINGSIZE.COM Ring Sizes USA Size 5 = about 16mm diameter USA Size 6 = about 16.5mm diameter USA Size 7 = about 17.5mm diameter USA Size 8 = about 18mm diameter USA Size 9 = about 19mm diameter USA Size 10 = about 20mm diameter USA Size 11 = about 20.5mm diameter USA Size 12 = about 21.5mm diameter USA size 13 = about 22.5mm diameter USA Size 14 = about 23.5mm diameter Species:Ring Material: Stainless Steel (male) Black gold plating(Female) Style: Wedding Ring Sex:Women and men Color:black+sky blue Mainstone:cz+Aquamarin(5MM) Stamp:10KT Quantity:2PCS(Ring Sets+Band) High quality in EU and US quality standard