Sew the lining to the vest at the armholes and neckline first

The fastest way to attach lining is to sew it to the finished vest at the openings—armholes, neckline, and front edges—rather than constructing the lining as a separate garment and inserting it whole. This method lets you work with flat pieces and gives you room to adjust fit as you go. You will pin the lining to the vest with right sides facing, sew around each opening, then turn the vest right-side out so the lining sits inside.

Start with the armholes. Place the vest and lining with right sides together, matching the shoulder seams. Pin around the entire armhole opening, easing the lining to fit if it is slightly larger. Sew with a 5/8-inch seam allowance using a straight stitch, then trim the seam to 1/4 inch and clip into the curve every half-inch so the seam will lie flat when turned.

Repeat this process for the other armhole, then move to the neckline. Pin the lining to the neckline with right sides facing, matching shoulder seams, and sew with the same seam allowance. Trim and clip as before. The front edges—left, right, and any center front opening—are sewn last, after you have secured the lining at the armholes and neckline.

Key Takeaways

  • Sew the lining to the vest at the armholes and neckline with right sides facing, using a 5/8-inch seam allowance, before closing the front edges.
  • Trim seams to 1/4 inch and clip into curves every half-inch so the lining will not bunch when you turn the vest right-side out.
  • Leave a 4- to 6-inch opening along one front edge so you can turn the vest and lining right-side out and close the opening by hand.
  • Understitch the lining seams—sewing through the lining and seam allowance only—to keep the lining from rolling to the outside of the vest.
  • Press the vest flat after turning and hand-stitch the opening closed with a ladder stitch for an invisible seam.

Understitch the seams to prevent the lining from rolling outward

After you sew the lining to the armholes and neckline but before you turn the vest right-side out, you need to understitch. This is a row of stitching that runs through the lining and the seam allowance only—not through the vest fabric itself. It holds the lining in place and stops it from rolling to the outside edge of the vest where it will show.

Working on the wrong side of the lining, fold the seam allowance toward the lining. Sew a straight line about 1/8 inch away from the seam, catching the lining and seam allowance. Sew the entire armhole, then the neckline. Use a thread color that matches the lining so any stitches that show will be less visible. This step takes a few extra minutes but makes a huge difference in how professional the finished vest looks.

Leave an opening along one front edge to turn the vest right-side out

Before you sew the front edges, decide which side will have your turning opening. The left front is traditional, but either side works. Plan for a 4- to 6-inch opening somewhere along that edge—usually in the middle, away from stress points like the shoulder or hem.

Pin the lining to the vest along the entire front edge, but do not pin the section where your opening will be. Sew from the top of the front edge down to the opening, stop, backstitch, and cut your thread. Skip the opening. Start sewing again on the other side of the opening and sew to the bottom. This leaves a gap in the seam that you will use to turn the vest.

Trim the seam to 1/4 inch along the entire front edge, including the opening. Clip into any inside corners (like where the neckline meets the front edge) so the seam will turn smoothly without bunching.

Turn the vest right-side out through the opening

Reach through the opening you left in the front edge and grab the shoulder seam of the vest from inside. Pull gently and steadily until the entire vest turns right-side out. The lining will now be on the inside where it belongs. Smooth out the seams with your fingers, working from the opening outward so no wrinkles get trapped inside.

Use a point turner or the blunt end of a wooden spoon to push out the corners and curves, especially at the neckline and armholes. Be gentle so you do not poke through the fabric. Once the vest is fully turned and smooth, press it flat with an iron on a low to medium setting, paying special attention to the seams and edges.

Close the opening with a ladder stitch for an invisible seam

The opening you left in the front edge is now closed by hand using a ladder stitch, also called a slip stitch. This stitch is nearly invisible when done correctly because the thread runs inside the fold of the fabric rather than across the surface.

Thread a needle with thread that matches the vest fabric. Knot the end. Bring the needle up through the fold of the vest seam allowance (not through the lining), about 1/4 inch to the left of the opening. Slide the needle horizontally inside the fold for about 1/4 inch, then bring it back out. Cross over to the lining side and insert the needle into the fold of the lining seam allowance directly across from where you came out. Slide the needle inside the lining fold for 1/4 inch and bring it back out. Return to the vest side and repeat, working your way along the opening.

Pull the thread gently every few stitches so the opening closes smoothly. The thread should disappear into the folds and not show on the surface. When you reach the end of the opening, make a small knot inside the fold, slide the needle through the fold for an inch, and bring it back out. Trim the thread close to the fabric. The knot will be hidden inside the seam.

Press and finish the vest edges

Once the opening is closed, press the entire vest again, paying attention to the front edges, armholes, and neckline. Use a pressing cloth (a thin cotton cloth or even a clean kitchen towel) between the iron and the vest to avoid shine marks, especially on darker fabrics.

If your vest has raw edges at the hem or front that are not finished, you can bind them with bias tape, fold them under and stitch, or leave them raw if the fabric does not fray badly. Some vests are designed to have finished edges; others are meant to hang loose. Check your pattern instructions for what is intended.

Try on the vest and check the fit. The lining should lie smoothly against your body without pulling or bunching. If the lining is too tight or too loose in places, you can make small adjustments by taking in or letting out the seams where the lining attaches to the vest. These adjustments are easiest to make before you close the turning opening, so if you notice a problem, you can reopen the ladder stitch, adjust, and close it again.

Common mistakes and how to avoid them

The most common mistake is not clipping into the curves at the armholes and neckline. If you skip this step, the seam will bunch and pucker when you turn the vest right-side out, and no amount of pressing will fix it. Clip every half-inch, cutting almost to the stitching line but not through it.

Another frequent problem is forgetting to understitch, which causes the lining to roll to the outside edge and show. Understitching takes only a few minutes and prevents this entirely. If you forget and discover the problem after turning, you can still go back and understitch from the inside, though it is more awkward.

A third mistake is making the turning opening too small. A 4- to 6-inch opening is the minimum; if it is smaller, you will struggle to pull the vest through and may tear a seam. If you are working with a heavy fabric, make the opening even larger—up to 8 inches.

Finally, do not pull too hard when turning the vest right-side out. Steady, gentle pressure is faster and safer than yanking. If the vest feels stuck, stop, smooth the seams from the outside, and try again. Forcing it can tear the lining or the vest fabric.

Frequently Asked Questions

Can I sew the lining to the vest before I sew the side seams?

Yes, but it is harder to work with. If you attach the lining to the armholes and neckline before the side seams are sewn, you will have to match and sew the lining side seams to the vest side seams at the same time. Most people find it easier to sew the vest together first, then attach the lining to the finished openings.

What if my lining fabric is slippery and keeps sliding around?

Use more pins—place them every 2 to 3 inches instead of every 4 to 5 inches. Sew slowly so the feed dogs can grip the fabric evenly. You can also use a walking foot on your machine, which feeds the top and bottom layers at the same speed and prevents slipping.

Do I have to use a ladder stitch to close the opening, or can I machine-stitch it?

You can machine-stitch it, but the seam will be visible on the outside of the vest. A ladder stitch is invisible, which is why it is preferred. If you choose to machine-stitch, use a thread that matches the vest fabric and sew slowly for a neat line.

What if the lining is too big or too small after I turn the vest?

If it is too tight and pulling, you can let out the seams where the lining attaches to the armholes or neckline by 1/4 to 1/2 inch. If it is too loose and bunching, take in those seams by the same amount. Make small adjustments and try on the vest between each one. You can do this before or after closing the turning opening, though it is easier before.

Can I attach the lining by machine all the way around, including the turning opening?

Yes, if you are comfortable with a visible seam on the inside of the vest. Sew the entire perimeter with a 5/8-inch seam allowance, trim and clip, then turn the vest right-side out by carefully cutting a small slit in the lining only (not the vest) and stitching it closed by hand. This method works but leaves a repair seam visible on the lining side.