I made a T-shirt quilt that some blocks were 14 some up to 17". We did an all over design for quilting it and it turned out wonderful. The neice that received the quilt for her graduation from HS is graduating from college and going on to Grad school. The quilt is still going strong and shes used it all 4 years and says it will be on her bed at the next apt. I know your quilt will be loved.