Originally Posted by
pennycandy
Years ago before the deep sheets I sewed some elastic diagonally across from the side to the end. I found it easier to use flat sheets and didn't bother to sew them together. They stayed tucked just fine.
This is what I did. Found the sheets at St. Vinney's, and they must be quite old. My mattress is not that thick, but to thick for this fitted bottom. So I sewed a piece of elastic across the corner about 12 inches from the corner seam. Works well.