Now we will turn back to our Holiday blouses, and stitch the underarm seams. This can be done on the sewing machine but I find it very difficult to maneuver it around under a normal-size presser foot, so I usually do it by hand. If you do this on the machine use a very short stitch length.
Step 8 : Stitch the Underarm Seams
Use a 1/4-inch seam allowance. If you sew by hand, it’s fine to use a running stitch, but place a couple of extra stitches at the corner under the arms for reinforcement.
When the stitching is done, trim the seam allowance to a fat 1/8-inch, and clip the four underarm corners where the sleeves connect to the bodice. It’s hard to see in the pictures, but clipping the underarm corners is very important for the blouse to be able to turn right-side out properly. It’s ok to use a fray check product on the underarm seams if you have any concerns about fraying or tearing. Now it’s time to learn how turn the blouse right-side out!