SPANX Haute Contour Nude Shape wear Bottoms Size B (S-M) SPANX Haute Contour Nude Shape wear Bottoms Size B Preloved, good condition Size B in Spanx hosiery and specific shapewear styles typically fits individuals between 4'10"–5'9" in height and 115–150 lbs in weight. It is generally considered a small-to-medium size depending on the specific product line.