If you're going to get a different fabric for the squares it will be. I did a baby sized wall quilt from the Kona Cotton New Brights Palette Jelly Roll and almost have enough left for a 2nd quilt, but not quite. I just sewed long sides together, though, not a jelly roll race where you trim down the edges so maybe that would make a difference. I know my jelly roll came will all different lengths of fabrics -- some 2-3" longer than the shortest ones. I trimmed all mine flush since I was sewing on the WOF. Sewing end to end would give you more length & more options about exactly where to cut for your finished size. I'd probably pick up either a mini charm pack or another 1/2 yd of fabric to do your 2" squares out of [or pull from your stash].