Lab Created Blue Sapphire Ring This handmade ring features a 6mm Lab Created Sapphire bezel mounted on a 5mm wide 925 Sterling Silver Flower pattern band. Average rings are 2 to 2.5mm wide. With wider bands such as this it is generally advised to increase the ring size by 1/2 size. Oxidized to a Vintage Silver finish. Ring sizer included. Shipped in gift box. Sapphire is the birthstone for September.