Fill a clean sink with cool water. Add 1 to 2 tablespoons of mild hair conditioner or baby shampoo.

Submerge the sweater in the water and allow it to soak for 15 to 30 minutes.

Remove the sweater from the water and press it against the side of the sink to extract excess water. Don't wring the sweater; this can damage it.

Lay the sweater flat on a thick bath towel. Press down on the sweater with another towel. Dry the garment with the towel until it's damp but not soaking wet.

Lay another sweater or long-sleeve shirt flat on a large piece of parchment paper. Trace the outline of the shirt on the paper with a pencil.

Lay the shrunken sweater on the paper over the outline you drew.

Pull on the sweater's arms, neck, sides and bottom to stretch it out. Stop stretching when the sweater's shape matches the pencil outline.

Place heavy objects glass dishes on the arms and around the edges of the sweater. The objects will keep the sweater stretched as it dries.

Allow the sweater to dry completely before wearing or storing.