Mrs Darcy Wears the Trousers tutorial part four: adding the waistband and fastenings, and finishing the hems

Welcome to the fourth and final part of the Mrs Darcy Wears the Trousers tutorial. It’s now time to attach the waistband and fastenings, fit the trousers and finish the bottom hems.

First, you are going to prepare the waistband. Taking one piece of the waistband at a time, arrange the interfacing so that it is lying on the bottom half of the main fabric, on the wrong side, within the seam allowance. The interfacing should butt up along the horizontal centre line of the waistband piece. It should be glue (bumpy) side down. Using a pressing cloth to protect your iron, and following the manufacturer’s instructions, iron the interfacing into place.

With right sides together,pin edges U together.

Make sure that the interfacing runs along the bottom of both pieces.  Sew and press seam UU open.

Seam UU is the centre back of the waistband. Then turn edge S down so that it meets edge T, and press the long horizontal fold.

Open out the waistband again. Arrange your trousers, right sides out, so that the back is facing upwards. Lay the waistband along the top of the trousers, right side down, aligning seam UU with seam KK. The raw edge of the waistband (T) should align with the raw edge of the trousers (BG).

Start to pin the waistband to the trousers, working your way around from the centre back (UU). Keep going until you go past piece 5. Open out the pocket (pieces 3 and 4 and keep pinning.

Stop at the point where the pocket fabric meets the trouser fabric of piece 1 (seam NA).

Measure a further 2cm/ 0.75” and cut the waistband here.

Keep the short cut-off piece of waistband for later. Repeat on the other side.

Use your tailors’ chalk or fabric marker to mark the point where the waistband meets piece 1, on both the wrong and right sides of the fabric. This marks your sewing line; the further 2cm/ 0.75” is your seam allowance. Take out the final pin so that you can work with the cut end of the waistband. Snip your length of ribbon in two, and fold half of it to form a loop. Pin the ribbon loop to the right side of the cut waistband. The cut ends of the ribbon should overhang the cut end of the waistband, and it should be a quarter of the way from the top of the waistband (not including seam allowances). In other words, it should be in the centre of the interfacing, but on the right side.

Your ribbon loop will be sewn along the seam line. Make sure that your loop is big enough to accommodate your chosen button. Adjust if necessary. Sew the ribbon into place along the seam line.

Repeat on the other side of the waistband.

Now take one of your discarded lengths of cut-off waistband. (It should be easily long enough to cover the gap between your two cut ends of waistband – check that it is.) Arranging it in the same way as the pinned length of waistband (wrong side up, the raw edge of the waistband (T) aligning with the raw edge of the trousers (BG)), pin the cut end to the cut end of the pinned section of the waistband, wrong sides together. This is what it looks like with the seam allowance turned towards the new piece of waistband…

and here it is with the seam allowance flipped the other way.

Sew along the seam line. Zigzag the raw ends. Press this seam open.

Now pin the new length of waistband along the front of the trousers, until it meets the other cut edge of waistband. Taking care to ensure that it will be the right length to lie flat along the top of the trousers, pin these two ends of the waistband together at the sewing line, and sew. Zigzag the raw ends, press this seam open, and pin it down.

I’m afraid I forgot to take a photo of this until after I’d sewn the waistband to the trousers – so if you’re wondering why you can see those stitches, that’s why! Just ignore them…

Sew the waistband to the top of the trousers all the way along edge T of the waistband. Use the top of the interfacing to guide you.

This is what your waistband will look like when you’ve finished sewing…

and this is what it looks like when you flip it upwards.

Next, you need to hand finish the inside of the waistband. Press seam TH/G up towards inside of the waistband. Press the seam allowance of edge S inwards, wrong sides together. It should look like this before it is folded over:

Pin it down to the inside of the trousers so that all the raw edges of the waistband are contained neatly inside the waistband. It should look like this:

Sew seam SB/G by hand from the inside of the trousers. Make sure that your stitches are invisible from the outside. This is easiest if you sew edge S down to the seam allowances already there, rather than to the outside of the trousers. Here are my trousers with the waistband finished off, and folded as you are supposed to wear them:

Attach the buttons. Try your trousers on. They will look like clown trousers, with an enormous waist! Fold the pockets inside so that edge A roughly meets edge P. Adjust until there is an equal fold on either side of the centre front of the trousers, and they feel comfortable around the waist. See where the end of the loop meets the waistband, and mark with a pin.

 Take them off, and make sure that the pins are both an equal distance from the side seams. Adjust as necessary, then sew on your buttons in the places marked by the pins. (My waistband needs another press…)

Finish the bottom hems. Try your trousers on again. Fold up edges E and I until the trousers are the length you like. (They look really nice about an inch above the ankle.) Mark this length with a few pins. Turn the trousers inside out. Mark your desired length on the inside of the trousers with your tailors’ chalk or fabric marker. Mark another line 5cm/ 2” below this, and trim the excess fabric away. Zigzag the bottom of the trousers again.

Then turn the seam allowance under by 2cm/ 3/4” and press.

Fold it over a further 3cm/ 1 1/4”, press and pin (this should take them to your desired length).

Hand sew seams E and I using ladder stitch. (To do this, you simply catch a couple of threads of the outside of the trousers:

then take a bigger stitch along the inside of the hem:

before picking up a couple of threads from the outside of the trousers again.)

All done!

Wear your new trousers with pride. And rest assured that they are incredibly easy to adjust should you gain or lose weight – you just need to move the buttons…


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