Leamel3 Pairs Soft Feel All Day Comfort Run Resistant 40 Denier Opaque Tights Multipack

Are they discreetly packaged

What size is needed for 5 8 . And size 16?

What are the differences between these tights and the Premium 40d ones? Do the Premium have a gusset and stay-up band?

Are they good for vein compression? I should wear it for a long standing work