SET Active Sculptflex Power Leggings in Colour Rain

SET Active Sculptflex Power leggings in colour rain featuring a high rise and high compression and seamless fabric. Tried on once, clean and in new condition with no flaws. Size medium measuring 26" at the waist (unstretched). The website lists size medium as fitting size 6-8/28"-30" waist however reviews recommend sizing up - so these would best fit a size small.