Call the hospital where you want to donate before cutting any fabric. They may have specific requirements of donated items such as sizes, fabrics, battings and quilt density. They also may have pattern suggestions. The Hospital where I donate quilts wants all new fabrics, poly batting because of allergies, a denser quilting than normal (quilts get washed frequently), and no black or black print fabrics. It seems like a lot of rules for charity, but there are reasons for everything.