Taking in a shirt is a practical tailoring skill that transforms an ill-fitting garment into one that looks custom-made—no sewing machine required, though it helps. It’s a beginner-to-intermediate task that takes 1.5–3 hours depending on your experience and whether you’re working with a woven cotton, oxford cloth, or stretch blend. You’ll need basic tools and about 20 minutes of prep time before stitching begins.
Overview
| Skill Level | Time Required | Tools Needed | Estimated Cost |
|---|---|---|---|
| Beginner (with practice) | 1.5–3 hours | Scissors, pins, chalk or washable marker, needle & thread (or sewing machine), seam ripper | $0–$5 (most tools likely already owned) |
Tools & Materials
| Item | Quantity | Notes |
|---|---|---|
| Sharp fabric scissors | 1 pair | Never use paper scissors—they dull fabric edges and cause fraying |
| Ballpoint or universal needles (size 80/12) | 2–3 | Use ballpoint for knits; universal works for most woven shirts like oxford or poplin |
| Matching thread (poly-cotton or silk for dress shirts) | 1 spool | Match both color and weight: Gutermann Mara 100 is ideal for most cotton dress shirts |
| Seam ripper | 1 | Essential for cleanly removing original side seams without damaging fabric |
| Measuring tape & tailor’s chalk | 1 each | Chalk disappears after pressing; avoid permanent markers on light fabrics |
Step-by-Step Instructions
1. Try on and mark your new seamline
Wear the shirt inside out and have a friend pin or chalk where the new side seam should fall. Stand naturally—don’t suck in. Mark vertical lines from underarm to waistband, then continue down to hip level if needed. For most men’s dress shirts, taking in ½" per side yields a noticeable but balanced fit. Women’s shirts often benefit from ⅜" per side to preserve darts and shoulder alignment.
- Tip: Use a ruler to ensure your chalk line stays parallel to the original seam—deviations cause twisting.
- Warning: Don’t mark while the shirt is laid flat—it stretches differently off-body. Always pin or chalk while wearing.
2. Remove the original side seam carefully
Lay the shirt flat, right side up. Use your seam ripper to snip every 3–4 stitches along the side seam, pulling threads gently outward—not upward—to avoid snagging the fabric. Work slowly from hem to underarm. If the shirt has a French seam or fell seam (common in high-end brands), remove both layers separately.
- Tip: Place a piece of scrap fabric under your work area to catch loose threads and prevent them from embedding in your table surface.
- Warning: Avoid cutting the seam allowance—leave at least ⅜" intact for resewing. Less than that risks puckering or seam blowout.
3. Pin and baste the new seam
Fold the fabric along your chalk line, right sides together. Pin perpendicular to the seam every 1.5"—start at the underarm curve, then work toward the hem. Hand-baste with long running stitches (¼" long, ¼" apart) to test the fit before committing. Try it on again—adjust pins if the waist pulls or the sleeve cap feels tight.
According to the Custom Tailors & Designers Association’s 2022 workshop survey, 73% of fit issues in self-altered shirts stem from skipping the basting step—leading to asymmetrical seams or uneven hems.
4. Sew the new seam and finish the edges
Use a straight stitch (2.5 mm length) on your machine—or backstitch by hand with a whipstitch for durability. Sew slowly through the underarm curve: reduce speed and lift the presser foot briefly to pivot if needed. Trim the original seam allowance to ¼", then zigzag or overlock the raw edge. Press the seam open with medium heat and steam—never drag the iron; lift and press.
- Tip: For hand-sewn seams, use a prick-stitch (tiny, nearly invisible stitches) along the seamline for clean, flexible results.
- Warning: Skipping edge finishing causes fraying within 3–5 wears—especially on non-preshrunk cotton or linen blends.
Pro Tips
Fit isn’t just about width—it’s balance. Taking in only the side seam without adjusting the sleeve cap or shoulder seam can create tension at the armhole. If your shirt gapes at the back or pulls across the chest after alteration, you likely need a sleeve cap adjustment or shoulder taper.
“The biggest mistake I see in DIY shirt alterations is over-tightening the waist. A well-fitted shirt should allow two fingers to slide comfortably between fabric and torso at the natural waist—not suction-cupped.” — Elena Ruiz, master tailor at The Garment Workshop, NYC (2023)
Always pre-wash and dry the shirt before altering—especially if it’s 100% cotton or linen. The U.S. EPA estimates that 14% of household water usage is from leaks, but fabric shrinkage accounts for nearly 22% of post-alteration fit failures (American Textile Institute, 2021).
Can I take in a shirt with darts?
Yes—but darts must be repositioned, not just shifted inward. Measure the distance from the dart apex to the side seam on the original pattern, then replicate that spacing from your new seamline. Redraw the dart legs with chalk, tapering to zero at the apex. Baste first, then sew with a narrow zigzag to secure the fold.
What if my shirt has a yoke?
The yoke doesn’t need alteration unless the shoulders are too wide. Focus on the side seam below the yoke. However, if you’re taking in more than ¾" total, consider adjusting the yoke seam slightly—especially on structured dress shirts where yoke width affects collar roll.
How do I handle curved areas like the underarm?
Clip the seam allowance every ½" along the curve *before* sewing—just to, not through, the stitching line. This lets the fabric lie flat when pressed. When sewing, guide the fabric gently; don’t pull or push. A walking foot helps prevent shifting on slippery fabrics like rayon blends.
Will this work on a T-shirt?
Yes—with caveats. Knit fabrics stretch, so use a ballpoint needle and stretch stitch (lightning or narrow zigzag). Reduce presser foot pressure if your machine allows it. Skip the seam ripper: cut the original seam with small, controlled snips instead—knits unravel easily.
Do I need to adjust the hem after taking in the shirt?
Only if the side seam alteration changes the shirt’s hang. Lay the shirt on a flat surface and compare front and back hems. If one side dips more than ⅛", trim evenly and re-hem using a blind stitch or twin-needle topstitch.
Can I take in a shirt that’s too long, too?
Absolutely—combine this method with our guide to shortening a shirt. Alter the side seams first, then shorten the body. Doing it in reverse risks misaligning the side seam and bottom hem.
With careful marking, steady stitching, and proper pressing, taking in a shirt becomes repeatable—not risky. You’ll gain confidence with each project, and soon you’ll spot fit flaws others miss. Keep a notebook of measurements: what worked on your Brooks Brothers oxford may differ from your Uniqlo twill, and that knowledge compounds fast.