I purchased the ring sizing kit for $10 as it was mentioned that cost would be deducted with the purchase of a ring. Unfortunately there was no details on how to do this, no promo code provided. When I went to purchase a ring there was no indication of how to get that cost deducted so I didn't go ahead with a subsequent purchase. Also, the right ring size according to the kit wasn't an option in the ring I wanted, which left me in a position of having to decide if I wanted a ring that was going to be a size too big or too small. Felt like a waste of time and money.