MANZI2 Pairs 400 Denier Black Tights Women's Thermal Warm Fleece Opaque Tights

I’m 5”7/8 and on the slim side, I wear 6-8 clothing, but I have quite long legs, what size would people recommend?

Do these look shiny?

Are these tights static? I’d like to wear with a dress. Thanks

Im looking for uk size 12