Most ring sizes are listed in the product sku. For example: BR_scrl0010_y-6 is a size 6. If there is no indicator of size within the Sku or the product description this indicates that the supplier carries all regular ring sizes for that particular product. As such, upon receipt of your order with us we will contact you to verify the ring size your customer wish to have prior to processing the order with the supplier. Make sure to ask your customer as to the size of ring they’d like to purchase and then indicate that when you place the order through us.