To unshrink a shrunken wool sweater, soak it in a solution of baby shampoo and warm water for 15 minutes, spread it over butcher paper, stretch the sweater to the desired size, and place heavy objects over the edges. Remove the objects once the sweater is dry.
- Soak the sweater
Pour 1 quart lukewarm water into a sink, add 1 tablespoon of baby shampoo, and stir the mixture to form a uniform solution. Turn the sweater inside out and submerge it in the solution. Let it soak for 15 minutes.
- Prepare the surface
Spread a properly sized sweater over butcher paper, then use a pencil to trace around the properly sized sweater. Remove the traced sweater and put it aside. Lift the shrunken sweater from the water, and gently squeeze out the excess water. To avoid damaging the fabric, don't wring out the garment.
- Spread the sweater
Spread the shrunken sweater over the pencil outline. Hold the side edges of the sweater, and stretch it to fit the pencil outline. Secure the edges in place by placing heavy objects over them. Repeat the process for the top and bottom of the sweater. Allow the sweater to dry, then remove the heavy objects.