The leg warmers are made from the exact same cotton knit as the cardigans, so that is to say 100% Heavy knit Cotton. Each of the leg warmers will be available in 6 differentThere will be three different calf sizes in an attempt to fit a wide range of calf sizes (11 in to 19ish in). Each of those three calf sizes will also be available in two different heights, a shorter version (15 in) and a taller version (18 in). Please note that the sample size provided in the leg warmers is the “medium tall” version.    Please note I am working on the sizing and measurements right now prior to production. Once I have exact measurements I will update this listing. If you are unsure on sizing at the moment please wait until I have accurate measurements.