Not very stretchy. They're denim. By the end of yesterday they were seeming a little baggier though. Oh darn... I really liked those pants! I thought they were magic and were just conforming to me.
Rant some -- it can take awhile to notice in your clothes! I carry a lot of my weight around my midsection. My bras were fitting bigger before my pants.
The first time I was on a weight loss plan, I lost 20 pounds and barely noticed in my clothes. I became very frustrated and gave up. I really regretted that because I gained the weight back and have had to lose it all over again. Just be patient -- you'll begin to notice!