The fastest way to make a dress smaller
The easiest method is to take in the side seams — the vertical seams that run from your armpit to your hem on both sides of the dress. You unpick a few inches of the seam, move the fabric inward by the amount you need, and sew it back. If you need to remove half an inch total, you take in a quarter inch on each side seam. This works for dresses that fit in the shoulders and length but are loose through the body.
If the dress is too wide at the waist specifically, you can take in just the waist seam instead, or take in the side seams more at the waist and less at the hip. If it is baggy everywhere, you may need to take in the back seam as well as both side seams.
The key is to try the dress on, pin it to the size you want, and measure how much fabric you are removing before you cut or sew anything. Removing too much at once is permanent.
Key Takeaways
- Side seams are the safest place to take in a dress because they run the full length and you can adjust them gradually.
- Pin the dress on your body to the size you want, then measure the distance between the old seam and the new pin line to know exactly how much to remove.
- Take in equal amounts on both sides so the dress stays centered and balanced on your body.
- Unpick the old seam with a seam ripper, sew the new seam with a straight stitch, and try the dress on before trimming the excess fabric.
- If the dress fits at the shoulders and chest but not the waist, taking in only the waist seam preserves the fit everywhere else.
Taking in the side seams step by step
Put the dress on inside out and have someone pin the side seams to fit your body. If you are alone, pin one side at a time while looking in a mirror. The pins should run from your armpit down to your hem, and they should be snug but not tight — you need to be able to move and breathe.
Take the dress off carefully without disturbing the pins. Measure the distance between the original seam line and your new pin line. Write this number down. This is how much you will remove from that side. Repeat on the other side seam so both sides match.
Use a seam ripper to unpick the old stitches for about 6 to 8 inches at a time, starting at the underarm. Pull the thread gently so you do not tear the fabric. Once you have unpicked enough to work with, thread your needle or sewing machine with thread that matches the dress.
Sew a straight stitch along your new line, following the pins. Sew slowly and keep the line even. Once you have sewn the entire seam, try the dress on to check the fit. If it feels right, take the dress off and trim the excess fabric to about half an inch from your new seam. Finish the raw edge with a zigzag stitch or pinking shears so it does not fray.
Taking in the waist seam when the hips fit
If the dress fits well at the hips and chest but is loose at the waist, you can take in just the waist seam without touching the side seams. This keeps the dress balanced and avoids making the armholes or neckline too tight.
Put the dress on inside out and pinch the fabric at the waist until it fits. Have someone pin across the back waist seam and the front waist seam. Measure how much you are removing, then unpick those sections of the seam. Sew the new seam along your pin line, try the dress on, and trim the excess.
The waist seam is usually narrower than the side seams, so work carefully and check the fit often. You may need to adjust the pins and sew again if the first try is not quite right.
Combining side seams and waist adjustments
Many dresses need different amounts of taking in at different points. You might remove a quarter inch at the side seam under the arm, half an inch at the waist, and a quarter inch again at the hip. This creates a tapered fit that follows your body shape.
To do this, pin the dress on your body at multiple points — underarm, waist, hip, and hem — and mark each pin location with a pen or chalk. Measure the distance between the old seam and each pin. You will now have a curved line instead of a straight one.
Unpick the seam and sew along this curved line, using the pins as guides. Sew slowly at the curves so the line stays smooth. Try the dress on and adjust if needed before trimming.
When to take in the back seam
If the dress is baggy across the entire back — not just the sides — you may need to take in the center back seam as well. This seam runs down the middle of the back from the neckline to the hem.
The back seam is trickier because it affects how the dress sits on your shoulders and spine. Take in no more than a quarter inch total on the back seam, and do it in combination with the side seams rather than alone. Pin the dress on, measure carefully, and try it on after sewing to make sure the back does not pull or wrinkle.
If the back seam is a decorative feature — a visible seam with topstitching or a contrasting thread — taking it in may be noticeable. In that case, stick to the side seams instead.
Tools and materials you need
A seam ripper is essential for removing the old stitches without damaging the fabric. They cost a few dollars and are sold at any fabric or craft store. A small scissors works in a pinch, but a seam ripper is faster and safer.
You will need thread that matches the dress — bring a swatch of the fabric to the store if you are not sure. Pins hold the new seam line in place while you sew. A needle and thread or a sewing machine both work; a machine is faster and the seam will be stronger, but hand sewing is fine if you use small, even stitches.
Pinking shears or a zigzag stitch finish the raw edges so the fabric does not fray. If you do not have pinking shears, a zigzag stitch on a sewing machine works just as well. A measuring tape helps you measure the distance between seams accurately.
Common mistakes to avoid
The most common mistake is removing too much fabric at once. If you take in a full inch on each side seam when you only need half an inch, the dress will be too small and you cannot undo it. Always start with less than you think you need, try the dress on, and take in more if necessary.
Another mistake is taking in different amounts on each side. If you remove half an inch on the left side and a quarter inch on the right, the dress will hang crooked. Measure both sides and make sure they match before you sew.
Sewing the new seam too close to the old one can leave a visible line or pucker. Sew at least a quarter inch away from the old seam so the old stitches are completely removed and the new seam sits cleanly.
Forgetting to try the dress on before trimming the excess fabric is also risky. Once you trim, you cannot add the fabric back. Always sew, try on, and only then trim.
Frequently Asked Questions
Can I take in a dress if it has a zipper?
Yes, but work around the zipper. If the zipper is on the side seam, unpick the seam on either side of the zipper but leave the zipper itself in place. Sew your new seam up to the zipper, then continue sewing on the other side. If the zipper is at the back, you can take in the side seams without touching it.
What if the dress is too tight in the shoulders?
Taking in the side seams will not help if the shoulders are the problem. You would need to adjust the armhole or shoulder seam, which is much more complex. Consider having a tailor do this, or wear the dress as is if the tightness is only slight.
How much can I safely take in?
Most dresses can be taken in by up to one inch total across both side seams without looking strange. If you need to remove more than that, the dress may be the wrong size to begin with. Start with a quarter inch on each side and see how it looks.
Do I need a sewing machine or can I hand sew?
Hand sewing works fine, but the seam will be weaker and take longer. Use small, even stitches and go over the seam twice for strength. A sewing machine is faster and creates a stronger seam, but it is not required.
What thread color should I use?
Match the thread to the dress fabric as closely as possible. Bring a swatch to the store and hold it next to thread colors in daylight. If you cannot find an exact match, choose one shade darker rather than lighter — it will be less visible.