I am in the process of enlarging my husband's favorite throw. First I purchased fabric to coordinate with the throw, then I took of the binding and am adding several 3 1/2" rows using the Quilt-As-You-Go method. I added new batting with a zig-zag stitch, attached the backing and am sewing the rows of fabric on to the quilt. Once it's done I'll put on a new binding and it will be approximately 18" wider and 18" longer. (But I think a new throw might have been easier and would look a lot better!)