Ok, I know you have the answer, but I'm adding!!! You'll have plenty of fabric for a lap size! Remember, you can add borders! (No, there isn't a 4 slice OBW ... only 6 or 8... you have a good amount with your 6 yards for a 6 slicer!) I do the 8 slice octagons ... I like them a lot ... I've only made one hexagon, but it was gorgeous too! YOur fabric will be awesome ... lots of black, but a little border in one of the colors in the fabric will really make it perfect! I'm attaching my "Christmas" quilt ... yes, it's blue, but it was originally poinsettas, and the backing is silver and white and it makes it work for me. Good luck. Post pics when you are done!!!