Jaeger jacket: Sewing Instructions

Jaeger documentation is under construction

This documentation is not yet finished.


Close the front darts

Close the front darts

Fold double

Fold the front double with the good sides together and pin it down so the fold is neatly in the middle of the front dart.

Sew darts

Sew the front dart close, taking care to have the dart stop at the correct top end. The bottom is not that important as it will be covered by the pockets. But the top end of the dart will be clearly visible, so please make sure to have it end at the same height at both sides.

Cut open and press

Once the front darts are closed, cut open the dart at the back. You won’t be able to cut it open all the way to the tip, but that’s fine. Press open the darts where they are cut open, and press the rest to the side. Take care to only press from the back. Pressing from the front will likely mark your fabric.

Construct the chest pocket

Apply fusible interfacing to the back of the chest pocket

Apply fusible interfacing

Apply a rectangular piece of light fusible interfacing around the chest pocket area so that it extends a few cm in all directions.

We’re not using fusible on the entire front

Sportcoats are typically made from somewhat heavier fabrics. That, and the fact that I prefer to use canvas rather than fusible interfacing, means that I don’t interface the front with fusible.

Baste the chest welt outline, mark top line endpoints

With the fusible in place, thread a needle and baste around the chest pocket to transfer the markings to the good side of the fabric.

This pocket differs from a traditional welt pocket. The welt extends above the pocket opening. This hides the pocket bag without the need for facings. The top part of the opening is also smaller than the welt, allowing you to slip-stitch it closed.

On the top line of your basted welt pocket, mark 0.5cm inwards from the corners of the top line.

These points are notches on the front part of your pattern.

Close the chest pocket welt

Fold, press and sew the side seams of the welt

Fold the welt double with the good sides together, and close the sides (sew the side seams).

Trim seam allowance, turn and press

Trim the seam allowances on the sides and especially limit the seam allowance towards the corner to avoid bulk.

Turn inside out so the good side is out and press.

Be careful not to overpress as you’ll be pressing from the good side of the fabric.

Baste the bottom line of the welt so you know where to sew

Baste a stitching guide at the bottom of the welt to mark the welt/seam allowance boundary. This will be the line to sew on later.

Sew the welt to the front

Attach the chest pocket welt to the front

Place welt down on good side of front with the folded side downwards, and sew to bottom line. Make sure to stop and start exactly at the edge of the line you basted.

Sew the chest pocket bag to the front

Attach the chest pocket bag to the front

Place the pocket bag down on the front. The front with good side up, but the pocket bag with bad side up. Make sure to have the longest side of the chest pocket bag on the highest side of the chest pocket.

Only slanted chest pockets have a higher and lower side.

Sew this in place along the top line. Remember this should be shorter than the bottom row of stitches to attach the welt, since you marked 0.5cm inwards from the corners.

As the pocket back is typically some slippery fabric, you probably want to pin or baste this in place prior to sewing.

Cut open chest pocket opening, turn, and press

Press the chest pocket Now cut open your welt in the middle of both seamlines. Don’t cut to the edge, but create a triangular shape there.

Flip the pocket bag and welt to the backside by passing both of them through the opening you just created.

Get everything to lay nice and flat, and press.

Now, bring the welt only to the front and get it to lie nice and flat. Press again from the back.

Resist the urge to press this from the front.

Finish the chest pocket

Finish the chest pocket

On the backside, fold the pocket bag double and sew it to the pocket welt below the existing seamline of the welt.

Thread a needle and hand-finish the chest pocket by sewing down the sides of the welt to the front panel (don’t let your stitches show on the front).

Finally, close the pocket bag by sewing the sides. Do this by placing the front down with the good side up. Then fold over each side and sew the pocket bag. While sewing these sides, make sure to catch those triangular little pieces of the opening. This will reinforce the pocket opening.

Baste the chest pocket closed while we construct the jacket.

Prepare the fronts

Prepare the canvas for the fronts

Cut out the front canvas piece in a light and supple canvas placed on the bias. Cut out the entire front.

Cut out the front dart and close it with a zig-zag stitch, making sure not to let the canvas overlap.

Cut out the chest canvas piece. Align it along the roll line, and baste it in place on front canvas piece.

The chest piece is marked on the front part of your pattern.

Baste canvas to the fronts

Pad-stitching, you love that stuff, right?

Now baste the front canvas and chest piece to your front. Keep in mind that the canvas has no seam allowance.

Baste it a bit inwards from the seam line so you can fold it away when sewing these seams later.
You don’t want your canvas to get caught in the seams.

Pad-stitch your lapels

Time to feel like a real tailor, and pad-stitch those lapels.

Make sure to make the stitches a bit smaller towards the lapel tip, to make sure it lies flat against the chest, curling a bit inward instead of outward.

If you’re not sure how to pad-stitch the lapels, let us know and we’ll make an attempt to document it.

Tape the lapel edge and roll line

Now we are going to hand-sew tailor tape along the lapel edges of the front, and along the roll line. This will also secure the canvas to the front here and there.

Keep in mind that:

  • The tape along the roll line should be placed inside the roll line.
  • The tape along the roll line should be about half a centimeter shorter than the distance it spans. The slight tension this creates helps the lapel roll nicely and contour to your body.
  • The tape along the lapel edge should be placed inside the seam line
Don’t sew through your fabric

While sewing the tape to your front, avoid pushing your needle all the way through your fabric so that your stitches will show on the front.

At the same time, you should not secure the tape only to your canvas either. Instead, you should try to catch a few threads of your fabric on every stitch, so that the tape is secured in place, yet the stitches don’t show at the front.

This is less of an issue above the break point of your lapel where the fabric will be on the backside of the lapel.

Close the body

Close the side seams

Close the sides

Place your front with the good side up, and your side on it with the good side down.
Align the front/side seams, pin them in place if you feel like it, and sew them together.

Place this down with the good side up, and place your back on top with the good side down.
Align the back/side seams, pin them in place if you feel like it, and sew them together.

Make sure the canvas does not get caught in the seam.

Note for sewing vents

If you have a double vent, this seam will contain the vent.

Sew the downward part of the side/back seam and the sideways part that forms the vent. Do not sew downwards after that.

Close the back seam

Close the back seam

Align your two half-jackets with the good sides together, and close the back seam.

Note for sewing vents

If you have a single vent, this seam will contain the vent.

Sew the downward part of the back seam and the sideways part that forms the vent. Do not sew downwards after that.

Close the shoulder seams

Close the shoulder seams

Align the shoulder seams with good sides together, and sew them together.

Make sure the canvas does not get caught in the seam.

Align the shoulder notches

Make sure to carefully align the shoulders based on the notches. Because of the different shape of the back and front panels on the neck side, the fabric edge looks different. So aligning those edges will not give you what you need.

So make sure to align the notches. It’s what they’re there for.

Make the collar

In order to look real crisp, the collar should be symmetrical on both sides. About 5mm difference is already visible to a collar, so the more precise you do these steps, the better.

Add markings to both collar and undercollar

Put the collar and undercollar on top of each other, baste the corners together and cut the basting. Then use a marking pencil or some chalk to mark the edges of the collar. Measure 2 times to make sure the remaining collars and the location of the corners are 100% identical on both corners Mark the collar Edges


The undercollar’s shape is that of the collar and collarstand parts combined.

Add interfacing or canvas to the outside collar stand and under collar

Either use a fusible interfacing, or, if you want to be hardcore use a horsehair canvas. Stitch it to the outside collar stand using the same technique as when adding canvas to the lapel. Add canvas to the collar

Sew the outside collarstand to the under collar, and add to jacket

Make sure the outside collarstand and under collar are aligned and sew together Sew the outside collarstand+undercollar to the neckline of the jacket Give small cuts in the fabric around the neckline to give it more ease Cut the seam allowance in the corners diagonally for a better fit

make small cuts in SA around collar


Sew the uppersleeve to the undersleeve until the split

Create the split at the end of the sleeve

Sew the other side of the sleeves Turn the sleeves with the good side out Add the sleeves to the jacket

Inside pocket

The inside pocket is a double welt pocket. Which is the same as the front pockets but without a cover. Please see images at the front pockets for details

Locate the position of the pocket on the left inner lining with basting Add some fusible interfacing around the area Draw the pocket on the interfacing. Add the welts to the upper and lower side of the pocket Sew the welts on the line on both sides of the pocket. Make use the welts end exactly on top of each other. Cut the pocket entrance to about 1 or 2 cm from the end. Cut the last part diagonally so you get a fish bone cut Turn the welts inside out, baste and press Turn the triangles inside out, baste and press Sew around the pocket to put everything in place Take the pocketbag, sew it to the lower welt and the other part to the upper welt (See: chest pocket)


Sew the lining back seam until the split Sew the figure seams in the front parts Add the whole lining together (front, side, back) Add the from lining to the front facing. Leave about 5cm open from the bottom Close the shoulders Add the inside collar stand to the uppercollar and add to the lining jacket Make small cuts in the neckline and the corners Add upper to lower sleeves Add sleeves to lining jacket

Close it up

But the jacket + lining jackets on top of each other with the good sides. Sew around the collar and continue all the way to the front facing Turn the jacket right side out Fold the sleeves in place (make sure they are not turned!!) Add the sleeves lining to the sleeves split Make sure the collars are straight on top of each other (they align) and add the seam allowances to each other by hand. Add in a few places front SA to lining SA by hand from the inside of the jacket Create the backsplit and manually add the lining to the main fabric Add buttonholes and buttons