I have been sewing a few strips onto blocks now and then so last night I made an effort to get more blocks up to the 15.5" size. I was going to make 24 blocks which would make a 60" x 90" quilt but now I'm thinking maybe 20 blocks for a 60" x 75" will be enough. I'm thinking large lap quilt for this one. I guess my layout will determine the number of blocks that it needs. If I stay with this type layout, 20 will be enough.