Came across these at Chatsworth Christmas Market, I always worry when buying M, L & XL clothing but they informed me that XL would fit my size 18 frame. I chose the black thermal ones and am absolutely over the moon with them, I wore them to the gym and they didn’t budge, phone was secure and having the 2nd phone pocket is a game changer. They also wash and dry beautifully. Won’t be going anywhere else for my leggings from now on.