My existing pop socks/sheer knee highs in brown have slid down my legs - I think I need a big size.. a search online today has got me nowhere - nothing I can see in Snag tights - bought the ones I have maybe in Calzedonia? No shortage of black ones online but like to wear brown and burgundy ones to tone with existing trousers. Very against tights with trousers and ankle socks just don't cut it.