Truform20-30 mmHg Compression Stockings for Men and Women, Thigh High Length, Dot-Top, Open Toe

I'm pregnant and 5'2" and roughly 140 lbs. what size should I get?

What are the measurements of the small, medium and large size open toe stockings?

how do i measure my leg for the right size, and should i purchase the next size up for comfort during surgical recovery time

Is this item only for females or is it a unisex item?