I spent a lot of time cutting 5 inch squares for my Sea of Squares quilt and now that I am assembling them I realize they are off slightly errr..... Instead of using charm packs I cut from fats but I just don't know where I screwed up Instead of being a quick quilt I am going to have to measure and recut. Here is the pattern if your not familiar with it...Christa?s Quilt Along 4.3 ? Sea of Squares Blocks | Christa Quilts

Any suggestions on better cutting? I am wondering if I should take a class or something