Things we Love about it:1. They look black and there is no black in birthstones. Well, I went out on the net and started fishing around and found these on more than one list as being best for the buck. I wear a size 6 and ordered a 5-6. Regarding delivery: I had the boots delivered to a Whole Foods drop box, and initially received a text from the delivery-person that they couldn’t enter the building. These stocking holders are beautiful. I put it together myself and the directions were easy to understand with a lot if drawings. I purchased them on Oct 18th, I didnt wear them right away but wearing them LESS than10 times they are coming apart at the seams on one- I started wearing Nov 1. As for which is primary and secondary, well to me that seems to change as the last one paired for some reason becomes primary when I have both working at the same time. As such Ill be returning them.