baleafWomen's Fleece Leggings Thermal Pants with Pockets Winter Warm High Waisted Yoga Trousers

Are the bottom of the leg stretchy enough to fit over a plaster cast?

What are the recommendations for keeping up the waterproofing on these leggings? would these need a dwp spray for instance to keep up the waterproof?

I am a large uk size 18/20 what size should I order?

How do we know what size to order put your height and weight in what's that for because it doesn't tell you what size anyway I usually have 14