Women's Mini Crew Socks (6-Pack)

I have small feet (size 5.5) and I have a problem with socks falling/loosening in my boots, do these socks stay put? thnks

Why was the elastic changed in the top of these socks? The 3rd set i ordered had much tighter elastic at the ankle. I liked the looser ankles.

Is this package 6 pairs (12 socks total)?

Do this shed?