I just did that , too after a no more except backing plan!material, but on a remnant table I got over 15 yards for $5! PLUS 90" wide back for $5 yd. I was so happy to save so much. 4 remnants are 100% cotton--the toile is blend, but is is just perfect for a runner back.
I could not believe it. LONG table runner and 6 place mats will be under $3 for the fabric --Xmas gift for pastor and wife....