How to Take in a Waist
A waistband that gapes at the back is one of the most annoying fit problems, and it is often fixable without touching the rest of the garment. Taking in a waist works on skirts, dresses and trousers alike and needs only a few seams opened.
Materials
- Matching thread
- Tailor's chalk
- Seam binding or twill tape (optional)
Tools
- Seam ripper
- Sewing machine
- Pins and hand-sewing needle
- Iron
Steps
- 01
Pin the excess on the body
Wear the garment inside out and pinch the excess fabric at the centre back until the waist sits snug but still comfortable. Pin the fold along the full depth of the waistband and mark the new seam line with chalk.
- 02
Unpick the waistband
Use a seam ripper to remove the stitching that holds the waistband to the body at the back, working only across the section you plan to change. Press the freed edges flat so you can measure them cleanly.
- 03
Draw the tapering seam
Draw a line that takes in the excess at the top and tapers gradually to nothing about 15 cm below the waistband, so you do not create a bulge. Keep the line symmetrical on both sides of the centre back.
- 04
Baste and check the fit
Stitch along the line with a long machine basting stitch first, then try the garment on right side out. Adjust before you commit with a permanent seam, because a waist seam is hard to let out once the allowance is trimmed.
- 05
Trim, finish and reattach
Trim the seam allowance to about 1 cm, finish the raw edges with a zigzag or overlock, and press the seam open. Reattach the waistband by machine, matching the original stitching line as closely as you can.
- 06
Close the gap and press
Slip-stitch any opening closed by hand, then give the whole waistband a good press. Hang the garment overnight so the fabric relaxes before you judge the final fit.
Deciding whether the waist can be taken in
Taking in a waist works when the garment is loose around the back or sides but otherwise fits. If the shoulders, bust or hips are also too large, the garment needs resizing overall rather than a waist adjustment.
How much can be removed depends on the fabric and the seam allowances available. A few centimetres at the back waist is routine; removing more usually means adding or deepening darts rather than narrowing a single seam.
Centre back, side seams or darts
The centre back seam is usually the best place to start, because it keeps the garment symmetrical and the seam is easy to hide. Side seams work on garments that have no centre back seam, and darts at the back waist are the classic solution on tailored trousers.
Whichever route you take, take in from both sides of the centre line. Removing the whole amount from one side shifts the grain and makes the garment twist when worn.
Elastic and knit waists
An elastic waist is the simplest to adjust: open the casing, shorten the elastic, redistribute the fabric evenly and stitch the casing closed. It is a good first alteration because it is completely reversible.
Knit waists need a stitch that stretches with the fabric. A narrow zigzag or a stretch stitch, plus elastic long enough to pass over the hips, prevents the seam cracking the first time the garment is pulled on.
Checking the fit before committing
Baste the new seam with a long machine stitch and try the garment on right side out. Sitting, bending and reaching all change where a waistband sits, so check more than a single pose in front of a mirror.
Do not trim the old allowance until the basted fit has been worn for a few minutes. Reducing a waist seam is easy; letting one out after the fabric has been cut is not.
Reattaching the waistband and finishing
Reattach the waistband along the original stitching line as closely as you can, working from the right side so the line stays even. Match the thread colour and stitch length to the original so the alteration does not announce itself.
Finish the new raw edges, press the waistband thoroughly, and hang the garment overnight before judging it. Fabric relaxes after an alteration, and what felt snug on the day often settles into comfortable.
Frequently asked questions
- How much can I take in at the waist?
- A few centimetres at the centre back is straightforward. Beyond that the shape of the garment starts to change, and adding or deepening darts usually gives a better result than narrowing a single seam.
- Can I take in a waist without unpicking the waistband?
- On some garments you can add darts at the back through the waistband, but the result is rarely as clean and the band can pucker. Unpicking just the section you are changing gives a flatter, more invisible finish.
- Will taking in the waist ruin the pockets?
- If the side seams are narrowed and the pockets sit in them, the pocket openings move inward and can distort. Working at the centre back instead leaves the pockets untouched.
- How much should I shorten the elastic?
- Reduce it to roughly your waist measurement minus 5 cm for woven fabric, or minus 2 to 3 cm for stretch fabric, then pull the garment on to check before closing the casing.