How do I stop sweaters from stretching out while they dry?

Start with the garment’s care label; fibers and construction can call for different care. When the label permits air drying, do not hang a wet sweater from its shoulders. Instead, lay it flat on a drying rack or another clean, level surface and keep it supported while it dries. For wool specifically, the supplied guidance recommends flat drying and shaping the sweater on the rack. [S1]

Before leaving it to dry, smooth it into its usual outline rather than pulling it longer.

Make small adjustments, not tugs. Place the sweater flat, straighten the body and sleeves, and ease the edges toward their usual shape. Keep both sleeves similar in length and the body lying evenly. Don’t pull hard on the cuffs, neckline, or hem to make them look more precise; if an area will not settle easily, leave it supported rather than forcing it.

For wool, shaping it while it lies flat is consistent with the supplied guidance. [S1] The source does not establish a universal shaping method for every knit fiber or garment, so follow the label if it gives different directions.

For a wet sweater, choose a broad, level surface that supports the body instead of a hanger or a narrow chair back that leaves much of the garment unsupported. A drying rack or clean flat surface gives you room to lay the sweater out and shape it. The supplied wool guidance specifically recommends laying wool flat across a rack or another surface. [S1]

If you do not have a rack, use a clean, flat place where the sweater can remain undisturbed. This is a practical suggestion, not a claim that every surface or fiber is suitable; the care label takes priority.

If the label is missing, avoid assuming that instructions for one fiber apply to another. For heavily soiled wool, the supplied guide says dry cleaning may be preferable when the care label or washing instructions are absent. [S1] Consider asking a professional cleaner about the garment before washing it at home, especially when you cannot identify its fiber or construction.

For example, if a wool sweater is heavily soiled and has no label, you could contact a professional cleaner and describe the garment and missing instructions. The source supports that option for heavily soiled wool; it does not establish that dry cleaning is appropriate for every sweater.

Use this short routine:

1. Read the care label before choosing how to wash or dry the sweater.
2. If air drying is allowed, prepare a clean, level surface or drying rack.
3. Lay the wet sweater flat, with the body and sleeves supported.
4. Gently smooth it toward its usual outline without pulling on the edges.
5. Leave it supported while it dries; check the label if you are unsure about the method.
6. For heavily soiled wool with missing care instructions, consider professional care. [S1]

The key change is to support the sweater while it dries instead of letting it hang. The supplied evidence concerns wool and does not establish instructions for all knit fibers, so use the label for the specific garment.