After being washed, your sweater needs to be dried properly to keep its shape. Dry it flat to prevent it from stretching.
Step 1: Lay the sweater flat on a clean, dry towel.
Step 2: Gently roll the towel to squeeze out excess water. Do not wring out or twist the sweater.
Step 3: Reshape the sweater while paying particular attention to the neckline and sleeves.
Step 4: Lay the sweater on another dry towel or on a drying rack in a cool, shady place. Do not hang the sweater up to dry as this would cause it to stretch.