I am making a tumbler quilt for my guestroom. I have been cutting out tumblers 6 1/2 inch. So far I have cut out 13 different fabrics I figure 12 across the 13th on the second row. Does that sound right?? has any one made a queen size? how many down??? 13? I will add borders also but trying to get the right amount of tumblers that I need.