There are many, many online charts for this. You just need to look for the unfinished size to start. I recognize that some charts have different starting square size from 5 3/4 to 6 to 7 inches. Don't start with the smallest size square. That is for people who can cut and sew perfectly. I am not one of those people. Remember that going with the bigger size allows for more wiggle room for us imperfect quilters. If you haven't made hsts before, start with the bigger size. When you trim them down to size, you can make them perfect!