Patchwork Crochet Blanket

My boyfriend and I have started another blanket. There are five different colors and we are making single stitch squares measuring 6 inch x 6 inch squares. So far, our sizes aren't perfect. It is taking some getting used to. We have several squares of the different colors finished, except we haven't bought one of the 5 colors yet. I don't know how stitching it together will actually work.