I've been looking for plus-size thigh highs for AGES. So, after much frustration I made my own- I simply cut (at the crotch) a pair of cable-knit leggings and then used the bottoms and stitched them at the thighs and voila! Thigh Highs :)
PS.I was wearing shorts.
Cardigan&Boots- Zellers || Dress&DIY Thigh-Highs- New Look