It is partly paper pieced. The first block is about 9 1/2 inches, border 2 and 3 are 2 inch and the outside border 4 1/2". These are all unfinished dimensions, so I think that is 23 inches. It is a published pattern. Fiesta by Lynda Milligan and Nancy Smith. It is sold in quilt shops or online. www.possibilitiesquilt.com
The main pattern is 46X64. I think I will try that next.