Leg AvenueWomen's Nylon Striped Tights Costume Hosiery (pack of 1)

I'm 5'6 and 167lbs. Will I need the 1x/2x or plus?

I where a size 18, will they still comfortably fit? No crotch sagging?

I wear a size 9 in pants and im 5'5 would one size fit me or are they really small?

I am 5'2 size 13/14..170 lbs..will these fit?