The cover picture shows how the trousers are put on for the fitting.

Preparing trousers with waistband for fitting #F02

In the following instruction, I explain step by step via video and illustrated text instructions how I prepare a pair of trousers for fitting.

Even with made-to-measure trousers, it is highly recommended that you try them on before finishing them. Customers are even ordered to come to the tailor for a fitting before they can pick up their finished garment. For this reason, our patterns also include wider seam allowances in some places, which can be used to adjust if necessary. To get a realistic impression of how the finished trousers will fit, it is important to sew on the waistband to try them on. This is especially true for the shaped waistband, as the circumference at the bottom edge is much larger than at the top edge. Since the pants will be taken apart again after trying them on, I will sew the pieces together with the largest possible machine stitch and not do much interlocking. However, you can also baste the seams, which is particularly recommended for delicate fabrics. I wish you lots of fun!

Video instructions:

The video instructions are currently only available in German. Via settings you can have YouTube display the subtitles in your language of choice.

Pattern pieces made from shell fabric:

  • back pieces – 1 pair; the darts are already incorporated.
  • Front pieces (VH) – 1 pair; the area for the pocket is still cut for the fitting; after the fitting you can cut it off at the marked line.
  • waistband (B) – 2x

Pattern pieces from interlining:

  • waistband (EB) – 2 pairs

Paper pattern pieces:

  • Back (HH)
  • Front (VH)
  • Waistband (B)
  • if necessary, the template for the pocket position (P-TZ HH)

Tools and aids:

  • Pins or clips
  • Hand shears
  • Chalk or marker pen
  • Basting thread and sewing needle if necessary

At this point, I am anticipating the work step for the waistband processing. I will replace the inner waistband strip and make it from the same material as my pocket bags, rather than the outer fabric. This is a nice detail and you can better distinguish between the inside and outside of the waistband in the instructions. With a pattern that is intended for elastic material, you should make sure that the material on the inside has similar stretch properties to the outer fabric. If you have chosen a pattern that is designed for non-stretch material, but you are using a stretchy fabric, fix the waistband so that it does not stretch out and the pants slip down as a result.

2. Close the seat seam

The picture shows how the hind trouser parts are placed on top of each other before trying on the trousers.
The two parts are placed flush on top of each other.

First, the seat seam is joined. Place the back trouser parts on top of each other, right sides facing.

The picture shows how the crotch seam is transferred to the pattern pieces before trying on the trousers.
The course of the inseam is transferred.

I use the pattern to transfer the finich seam course. The seam allowance runs parallel in the lower area up to the notch. The seam allowance becomes wider from the notch upwards. Here you can transfer the course to the notch at the center back of the waistband edge.

The picture shows how the back crotch seam is tacked together before trying on the trousers.
The back crotch seam is basted.

The pieces are then pinned together and sewn together using a large straight stitch or a basting stitch.

3. Close the front crotch seam

The picture shows how the front crotch seam is tacked before trying on the trousers.
The front crotch seam is basted.

I also lay the front pieces right sides together, pin them together at the short crotch seam and sew the section up to the slit end.

4. Mark the pocket position on the back of the trousers

The picture shows how the position of the back pockets is transferred to the trousers before trying them on.
The pocket position is marked on the back of the trousers.

If you have opted for pants with back pockets, I recommend marking the pocket position on the back of the pants. The positioning can have a major influence on the appearance, which in turn is a matter of how you like it.

I lay the back pieces in front of me so that the right side of the fabric is facing me. I place the template with the notch on the upper edge at the center back.

5. Close the leg seams

The picture shows which seam allowances must be observed for the leg seams
The seam allowances can be found in the pattern.

Next, close the leg seams. Note how wide the seam allowances should be. You can measure this in the pattern or recognize it by the distance between the notches at the beginning or end of the seam and the edge of the fabric. If there are no notches, the standard seam width of 10 mm applies.

The picture shows how the outer leg seam is pinned together to try on the trousers.
The outer leg seam is pinned together.

I lay the front trousers right sides together on the back trousers and pin them together at the outer leg seams. In doing so, I make sure that the notches meet.

The picture shows how the inner leg seam is pinned together before trying on the trousers.
The inner leg seam is pinned together.

I then pin the inner leg seam together. Here I make sure that the seat seam and short inseam of the front trousers meet exactly. From this crossing point – also known as the cross seam – to the knee, you need to stretch the back trousers slightly to the length of the front trousers. This difference is included into the pattern for a better fit.

The leg seams are now also joined with a large machine stitch or a basting seam.

The picture shows how to turn the trousers that have been sewn together at the leg seams.
The trousers are turned inside out.

You can then turn the pants inside out.

6. Pleat option

The picture shows how the pleat is folded at the waist.
The pleat at the waistband is folded according to the markings in the pattern.

If you have chosen a trouser shape with a pleat, you should now fold it and secure it with a few stitches.

7. Prepare the waistband

The picture shows how the waistband is reinforced before the trousers are tried on.
The interlining is ironed on.

Before I attach the waistband, I prepare it. First I iron the interlining. If you are using a sturdy fabric, it is not absolutely necessary to fix the inner waistband side as well. However, this is a matter of how you like it and depends on whether you prefer the waistband to be stable or softer.

The picture shows how the two waistband strips are placed on top of each other before trying on the trousers.
The waistband strips are placed on top of each other.

I now lay the strips right sides together and pin them together at the top edge.

The picture shows where the waistband is sewn together before the trousers are tried on.
The top edge is sewn together.

Since this seam is no longer unraveled, I sew together the top edge at 1 cm seam width with a normal stitch size. I start and end approx. 1.5 cm before the long edges. The beginning and end are not saved, as a short piece may have to be cut open again later, depending on how the corners are worked.

The picture shows how the top edge of a shaped waistband is cut before trying on the trousers.
The top edge of the shaped waistband is incised several times.

I now cut the seam allowance into the shaped waistband at intervals of a few centimeters so that it does not stretch at the top edge. So that the incisions do not stand out so much on the outside, it makes sense to offset them slightly in the two layers.

You can skip this step if you have opted for a straight waistband.

The picture shows how the seam allowances at the top edge of the waistband are pressed open before trying on the trousers.
Press the seam allowances open.

Next, I press the seam allowances open at the top edge of the waistband.

The picture shows how the waistband is ironed before the trousers are tried on.
The waistband is ironed from the inside.

Then I turn the waistband, lay the inner and outer parts inside out and press the seam flat from the inside. I make sure that it lies slightly inwards at the top and does not push to the outside.

The picture shows how the markings on the pattern are transferred to the waistband before trying on the trousers.
The markings are transferred.

I transfer the notches for the center back, the side seam and the center front to the outside of the waistband – if I haven’t already done so when cutting.

Hold the shaped waistband at the height of the side seam at the shortened upper edge of the waistband and test whether the seam at the front where the thread is diagonal still stretches
Test the shaped waistband to see whether it is still stretchable after sewing the upper edge of the waistband in the front diagonal thread path.

Now is a good opportunity to check whether the waistband length still matches the pattern. It could be that it has been altered by sewing or ironing. I also check whether the seam in the front area of the shaped waistband, where the fabric lies in the diagonal grain, is still stretchy.

8. Pin the waistband to the pants

The picture shows how the inseam is turned in at the center front before trying on the trousers.
The inseam is turned in.

I also mark the center front on the trousers and fold the left front piece inwards at the marking.

The picture shows how the waistband is pinned to the trousers before trying them on.
The waistband is tucked into the trousers.

Now pin the waistband into the trousers. Make sure that all the markings meet.

Caution: The waistband is too long on the upper side where it overlaps at the front. Don’t let this confuse you – this will be adjusted when the waistband is sewn on later.

The picture shows how the waistband is pinned to the trousers before trying them on.
The waistband is attached to the trousers.

Now I sew on the waistband. Here again, a large machine or basting stitch is used.

The picture shows how the trousers look when they are ready to be tried on.
This is what the finished trousers look like.

This is what your trousers will look like when they are ready to try on.

9. Try on pants and check measurements

The picture shows from different perspectives how the trousers are put on for the fitting.
The side length should be checked according to the marking.

Now the time has come – you can try on your pants for the first time!

Here are a few tips on what you should bear in mind when trying them on:

  • To get an impression of how the pants fit, I recommend taking photos that include at least the three perspectives in the picture above. You should take the photos as straight as possible – i.e. not at an angle from above or below.
  • Make sure that the waistband is at the right height. As there is still no button to close the pants properly, they can easily be pulled up a little too high or too low. To check this, you can measure the side length from the floor to the top edge of the waistband (see marking) and compare it with the side length you entered in the configurator.
  • If the waistband sits at the right height but is still too tight or too wide, compare the measurement you entered when configuring with the circumference measurement at the point where your waistband now sits.
  • If the pants seem a little too wide at the hips, remember that there will be pockets, which – depending on the thickness of the fabric – will also need a little space. It is best to try the pants on again briefly before sewing the waistband on the inside.
  • The tighter the fit you have chosen and the less stretchy your fabric is, the more likely it is that the pants will wrinkle at the back of the legs. This is because the pants have an “extra length” at the back, which you need so that you can sit down comfortably.
  • Wrinkles sometimes look worse in photos than they actually are. Be sure to take another look in the mirror to see what it really looks like.

If you still have problems with the fit, please send me an e-mail with pictures of how the pants look when worn (see above) and I’ll try to help. This works much better at this point than at a later date.

10. Cut the pocket opening on the front trousers to size

When you have finished trying on the trousers and have made any adjustments to the pattern, you now need to cut the pocket openings on the front trousers. If you have opted for trousers that either have no front pockets or seam pockets, piped pockets or patch pockets, this step is not necessary.

The picture shows how the pocket opening edges are cut back in the pattern after trying on the trousers at the front.
The pocket opening is cut away in the pattern.

First cut this part away at the corresponding marking in the pattern.

The picture shows how the pocket opening edges are cut back on the pattern piece after trying on the trousers at the front.
The pocket opening is also cut away on the pattern piece.

Then cut the two pattern pieces for the front trousers accordingly.

Here you will find the links to the next step. Select the link that belongs to the bag shape you have chosen.

If you don’t want pockets on the back trousers, continue here:

If you’re not quite ready yet and perhaps want to start at the beginning, you’ll find some links here: