We used to make tied quilts using sheets for the top and bottom but had to be careful not to buy the expensive kind with the high thread count.
We are given bed sheets no longer used by a local motel for the charity quilts we make at church. Saves a lot of money and are queen and king sized. But, be careful cutting them down to size, they are not torn straight, they are cut by machine on piles of fabric. It is better to tear them and be sure they are straight. Some smell like bleach so we wash them.
Carol J.