I make my own. I do not use a pattern. I just cut them to fit the plastic tray I have. 16" by 20" when finished. I sew them like a pillow case, then turn right side out for last hem. I also sort of quilt them, every 4 " I sew a seam from hem to hem both ways. This works beautifully and like the other ladies above, I use flannel or cute 100 % cotton print that I prewash. |