Add ease to a lining
When you line a jacket, it is important to add some ease (extra fabric) in the upper back as well as length. To add ease to a lining that is made from the jacket pattern pieces, I place the back pattern piece on the fabric fold with an additional 1/2" of space between the pattern line and the fabric fold. Then I sew a short 1/2" tuck at the neckline to leave extra fabric at the shoulder blades. If not using hem facings, I add about 1/4" to the length for the lining pieces to prevent sagging in the jacket.