Get in your car. Drive to Walmart. Go to the women's section. Find the Danskin workout pants, the kinds folded up on the shelves. Find the ones that are full length pants, in the boot cut style. Find your size. Purchase. Go put them on in the bathroom at Walmart.
I didn't actually change clothes in the Walmart bathroom, but that's probably only 'cause I didn't know they would be this comfy.