Working with sleeves may at first seem a little intimidating but they're really not.  Get past your intimidation by watching this video on an jacket inset sleeve and see how easy it really is. The in-set sleeve (also called a set in sleeve) means that the top cap of the sleeve is sewn completely into an armhole located at the edge of the shoulder in a bodice. Professor pincushion goes through the process from just a simple pattern form and takes you through underarm seams, hems, and attaching it to your garment's armhole.  The most important step is gathering the cap of the sleeve evenly so that it will ease into the armhole nicely.  Using these techniques, you'll be able to attach any type of inset sleeve to shirts, jackets, and dresses.