Now that you’ve got a pattern, it’s time to test out the fit! This is always the most time consuming part of any sewing, which is why we’ve given this bit more time. To save yourself some time, let’s make sure the pattern is as perfect as possible first. We’re going to do some professional pattern making here Label all your pieces with the relevant information, so if you want to make this again in 2 years you don’t have to puzzle anything out. Name of the pattern Which pattern piece it is How many pieces of it you’ll need to cut of which fabrics Whether or not there is seam allowance Any relevant pattern markings (like noting if an edge should be placed on a fold, or notches for matching pattern pieces) the grainline (which whoops you'll notice my pattern is missing. This should just be a double sided arrow parallel to the grain) [ Now, we’ll want to ensure you have a perfect pattern to work with. 1. Trueing the seam lines. Wherever you have two pieces that will be sewn together, make sure the seams are the same length. Note, this is a lot easier if your pattern doesn’t have seam allowance, since you can just match up the edges (and also why I prefer drafting without seam allowance generally). If you do have seam allowance, make sure to subtract it! Or if your paper is transparent enough like mine, you can lay the seams on top of each other. You can see my shoulder piece was somehow way off here! I taped a piece of paper underneath the shorter one, and split the difference in fixing the line (so the longer one became a bit shorter and the shorter a bit longer, rather than doing all the changes to one seam. The new seamline is highlighted in red. Don't forget to fix your seam allowance as well! 2. Checking angles. Where your pattern should have right angles (like the bottom of the front wrap), use a square edge of some kind to check. If it’s not a right angle, make it be one. 3. Where pieces should connect into a smooth curve (e.g. the neckline), make sure they do indeed form a smooth curve and not something with a kink or sharp corner where they join (e.g. at the shoulder). Now it’s muslin time! I'll come back to edit this post tomorrow with fitting issues to look for in the muslin, because I need to sew mine together and take pictures for that But this is enough to get started until then.