How to Alter Large Shirts
- 1). Turn both T-shirts inside out. Place the T-shirt that fits you on top of the larger one, using the T-shirt that fits as a template. Be sure to align the neck and top portion of each shirt. Pin the T-shirts in place.
- 2). Trace the sides of the template shirt onto the larger T-shirt. Continue the lines past the template T-shirt if you would like a longer shirt.
- 3). Fold the template T-shirt at the sleeve and shoulder seam so that the sleeve is not visible. The shape will, in most cases, be a slight curve. Trace this curve on both sides of the larger shirt.
- 4). Measure a one inch seam allowance on all sides. Use your ruler to measure out one inch from each side of the shirt, and mark that with the tailor's chalk.
- 5). Remove the pins and the template T-shirt. Cut along the seam allowance marks you made on the shirt you are altering.
- 6). Set the body of your shirt to the side. Line up the sleeves of the template shirt with the sleeves of the T-shirt, which will usually have been cut off as part of the excess. Make sure the hems at the ends of the sleeves line up.
- 7). Draw an outline of the sleeve. Mark off an extra one inch around the sleeve for seam allowances. Cut the sleeves out.
- 8). Pin the sleeves to the body of the T-shirt with the "wrong" sides facing outward. Sew the sleeves to the armholes.
- 9). Pin the sides of the shirt together. Sew the sides carefully, following the lines you marked earlier.
- 10
Fold the bottom of the shirt upwards onto the "wrong" side of the fabric. Sew a hem around the bottom of the shirt. - 11
Turn the shirt the right way out and try it on. Make any necessary adjustments.
Source...