Great question about 5 x 5 measurement. I already had the 5 1/2 x 5 1/2 with the Fons and Porter pack that had several other pieces (40% off at Jo Ann's) however, I wanted an exact 5 x 5 to Fussy Cut to use with some charm packs and make the disappearing 9 patches for quilts that required charm packs. I really love that pattern because it changes whenever you move the squares around. Couldn't find and 5 x 5 or 4 x 4. Hope that explains it for you.