MsGrace
Yes, you sew block by block. I stack them up and then do them.
Yes, fold it over again so you won't have a raw edge.
Acually you can make any size you like. That's the size I came up with. They sell hexagon shapes also. Just make your back one 3/4" larger to fold over and sew. Hope I answered all your questions clearly. I'm so glad you like my quilt! Thanks!!! Jan