If anything is woolen, you can still stretch the fabric. These simple instructions tell you how to return clothes, blankets, etc. original size.
Steps

Step 1. Fill your sink with warm water

Step 2. Add some shampoo (about the size of a coin) and stir the solution

Step 3. Place the item in the water so that it is completely covered with water

Step 4. Leave to soak for 30 minutes

Step 5. Take out the item and rinse with water

Step 6. Stretch the coat in small patches
Keep your hands close to each other, gradually moving to other areas, until you have covered the entire surface of the fabric.

Step 7. Stretch the product again, increasing the distance between the palms by about 30 cm

Step 8. Dry the product
Hang it so that the weight of the garment continues to stretch the desired area of the fabric (i.e., if the sweater has sat upright, hang it by the shoulders).