You have seen these boot socks pop on Pinterest or at the store, no?
I think they're really cute, but can't imagine stuffing my jeans into a pair of socks. I came up with a boot sock alternative that still has the look of a boot sock. I took an old sweater, cut the sleeves off, and pulled them up over my jeans. Then I put on my boots and voila--boot socks!
The sweater I used was really thin, which is helpful if your boots are tight. I think it would also be cute to use the sleeves from a waffle knit tee or a long sleeve striped tee. If you don't have a sweater or shirt sitting around your house, Goodwill has plenty of candidates. I even thought about using one of the boys stained sweaters. As long as the sleeve is stretch, it should work.
P.S. - Jason Wu's collection for Target hits stores this Sunday. I'm not sure about the little socks on the girls on the right or left--but love the outfit in the center.