Sewing the backing is never on the top of my list of fun things to do and it's even worse when I don't have enough fabric. As it is, with regular-width fabric, quilt backings usually need to be pieced. That requires having a seam either vertically (if you are using a couple lengthwise cuts of fabric yardage) or a seam widthwise. Selvedges need to be removed and dealing with such large pieces of fabric can be cumbersome. There is extra wide fabric available nowadays for backings so piecing is not required but I haven't bought any and try to make what I have on hand work for my project.
For the circle quilt I had some co-ordinating Batik fabric in my stash but it was literally just a couple inches too small to work. It is not worth the risk of having exposed batting if the backing isn't larger than the quilt top and I usually like about 4 inches of overage on all sides, just to be safe. With this quilt, not only did I have to cut the yardage and piece it horizontally for length, I also had to come up with a solution to make it just a bit wider. I auditioned a couple other Batik fabrics I had but nothing looked quite right.
In the spirit of making this quilt from my stash, I looked to the remainder of the stripped fabric I initially joined to make the circles of the quilt. It was a bit of a mess because of chopping willy nilly to fussy cut the circle arcs but I was able to get a long enough strip about 10" wide to insert into two lengths of the gold fabric. I think it looks really good, echoes the design of the front of the quilt, and adds a splash of colour to a boring quilt back. There are a zillion seams to deal with and quilting might become more challenging because of that but overall it was the perfect choice. Now I have the backing pieced and ready, along with the batting, so today will have to be basting day (also not the most enjoyable task!). After the quilt is assembled it will be fun to decide on a quilting design. I am considering a square meander or some fancy custom quilting but I will take some time to test stitching samples and thread colours before taking the plunge. These things can't be rushed!