Originally Posted by ckcowl
if you took those 4 yards, cut in half, turned and sewed together, you would have 72"x about 80"...not enough. if you get an extra yard you can piece enough to make the length work with your 90" top. the backing and batting needs to be about 5" larger (all the way around) than the quilt top, this is then trimmed after quilting is complete..so for your quilt you need a backing to measure 76"x100". you can piece your back anyway you want to. some people use a plain back, some make them scrappy , some just sew big blocks of fabric together until its the size you want...you can do it any way you want to reach the desired size
:thumbup:
another option would be to use some leftover blocks/strips or contrasting color from the front between the 2 pieces to do the back. you'd have a horizontal seam if you pieced this way.