It's no surprise that the Moda Love pattern is such a popular one... The pattern is written for 10" layer cake squares, but it can easily be adapted to 5" charm squares or 2 1/2" mini charm squares. Make it as large or as small as you like by switching out the pre-cut you use! Play with color placement and you can turn this into a heart block as seen in the 4th photo.
Want to size down? Here is the pattern written for the 5" charm square that finishes at 32" x 32".
Finished size: 72" x 72" (if made with 10" layer cake squares)