2 Rings for 1 Price, Cubic Zirconia Rings

I bought these similar rings for my niece to choose from to wear to her prom, she chose something else. Too late to return them - its been a couple years! One of them is a size 7, not sure which - dont know how to tell. I dont have a ring measuring tool. This is one reason they are 2 for 1 price. Shipping for inexpensive items is a drag, so buy more! Bundle at least 2 and save 10%!