I am making a quilt with the "10 minute block". It takes 5 charms per block. I am using 4 Black & white charms and cutting a fifth out of bright red material for the center diamond. It takes 3 seams to make the block. I did 14 blocks yesterday in between everything else, they are really 10 min. each.
http://www.youtube.com/watch?v=ZbTHlGGKMPM. I am using the 5" charms, the lady on the video uses 10" squares. I get 10 blocks per pack and 2 packs will make 20 blocks so roughly a 50"x70" including sashing and border.