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How to Fix Sweaters With Holes: A Beginner Darning Kit Does It

A hole in a sweater is a quick fix with a darning needle, matching yarn and a mushroom form. Learn the weave, no sewing skill needed.

By Jamilur Rahman Updated November 5, 2026 · 6 min read

Time
45 min
Cost
Under $20
Difficulty
Medium
A cream knit sweater with a small hole beside a wooden darning mushroom, a darning needle and balls of wool yarn
In this guide
  1. Quick answer
  2. Free vs. permanent fix
  3. What you'll need
  4. Why it happens
  5. Try this first (free)
  6. When free fixes aren't enough
  7. Buy the fix
  8. How to repair sweaters: match the repair to the damage
  9. What to skip
  10. FAQ
  11. Related problems

Quick answer

To fix sweaters with holes, darn them: weave yarn back and forth across the hole to build a new patch of knit-like fabric. Slip a smooth round form under the hole, anchor the yarn in the sound knit around it, then weave across and back. Matching yarn, a blunt darning needle and a darning mushroom make this easy for a beginner, and the repair holds up to normal wear and gentle washing.

Free fix vs. permanent fix

Free fix · 45 minutes

A spare needle, yarn and a smooth jar

  • Wash the sweater first so the knit relaxes
  • Use the spare yarn that came with it, or match color and weight
  • Weave a grid of yarn across the hole over a smooth jar
  • Keep the stitches loose so the knit does not pucker

How long it lasts: Holds for small holes. Sewing thread can cut into soft knit, so use yarn.

Most readers choose Permanent fix
Beginner darning kit (illustration)
Illustration

A beginner darning kit

The mushroom holds the knit flat so you weave an even patch. Blunt darning needles with large eyes slide between the loops without splitting the yarn. Mending yarn in several colors lets you match the sweater or choose a bold contrast for a visible mend.

What to get: Beginner darning kit

How long it lasts: A neat, even repair that holds up to normal wear. The kit works on every sweater and sock after.

Check price on Amazon

As an Amazon Associate I earn from qualifying purchases.

What you'll need

  • Sewing scissors

    For trimming loose ends

    You have it

  • Smooth jar or tennis ball

    Holds the hole flat if you have no mushroom

    Free
  • Our pick
    Beginner darning kit (illustration)
    Illustration

    Beginner darning kit

    Mushroom, blunt needles and mending yarn in one box

    Check price
  • Wool mending yarn (illustration)
    Illustration

    Wool mending yarn

    Match the fiber and thickness of the sweater

    Check price

Why it happens

1

Moths and carpet beetles

Small holes with chewed edges, often in clusters, point to moths or carpet beetles. They go for wool and dirty fabric. Wash the sweater before you repair it.

2

Wear at the elbows, cuffs and hem

Friction wears the yarn thin in the spots that move most. The knit loosens first, then a hole opens.

3

A snag that broke through

A pulled loop that gets cut or caught again turns into a hole. Pull a snag to the inside instead of cutting it, and it rarely gets that far.

Try this first (free)

Do these in order, starting with the simplest.

  1. Wash and trim

    Tool used: Sewing scissors

    Wash and dry the sweater first, so the knit relaxes and the repair does not shrink. Trim any loose frayed ends around the hole, but leave the knit loops alone.

  2. Choose yarn that matches

    Tool used: Wool mending yarn

    Match the fiber, so wool for wool, and the thickness. For a visible mend, pick a bold contrast color instead.

    Wool mending yarn (illustration)
    Illustration

    Tool for this step

    Wool mending yarn · Match the fiber and thickness of the sweater

    Check price on Amazon

  3. Set the hole over the form

    Tool used: Beginner darning kit

    Slide a darning mushroom or a smooth jar under the hole so the knit lies flat and slightly stretched, but not tight.

    Beginner darning kit (illustration)
    Illustration

    Tool for this step

    Beginner darning kit · Mushroom, blunt needles and mending yarn in one box

    Check price on Amazon

  4. Anchor and weave

    Stitch a ring of small running stitches about 1/2 inch outside the hole. Lay straight threads up and down across the hole, then weave side to side over and under them. Leave small loops at the edges so the yarn can stretch.

  5. Tie off

    Turn the sweater inside out, weave the tail through the stitches for about an inch and trim. Press lightly with a damp cloth and no heavy pressure.

When free fixes aren't enough

A darn works best on holes up to about 2 inches. For larger or irregular holes you can build a bigger patch on the mushroom, but if the knit around it is thin or stretched, it will keep tearing. In that case reinforce the thin area from the inside with an iron-on patch or add an elbow patch. If new holes keep showing up in clusters, check for moths, wash or dry-clean the sweater, and store wool in sealed bags.

Buy the fix

Still stuck after the free fixes? These are the products we would look at.

Our picks compared
PickProductFixesWho it's forBuy
Best pick
Beginner darning kit (illustration)
Illustration
Beginner darning kit
holes up to a few inches, with a flat, even repair Beginners who want one kit for sweaters and socks. Check price
Budget pick
Wool mending yarn in assorted colors (illustration)
Illustration
Wool mending yarn in assorted colors
the color and fiber match for a hole you stitch with a needle you own Anyone who already has a needle and a smooth jar. Check price
Best pick
Beginner darning kit (illustration)
Illustration

Beginner darning kit

Fixes: holes up to a few inches, with a flat, even repair

Look for: A wooden or plastic darning mushroom or egg; Blunt, large-eye darning needles; Wool or cotton mending yarn in several colors; Simple printed instructions.

Who it's for
Beginners who want one kit for sweaters and socks.
Honest downside
The hole is bigger than your hand or the knit is thin all around. Use a patch.
Check price on Amazon
Budget pick
Wool mending yarn in assorted colors (illustration)
Illustration

Wool mending yarn in assorted colors

Fixes: the color and fiber match for a hole you stitch with a needle you own

Look for: Fine, tightly spun wool that suits knit sweaters; Several shades, both neutral and bright; Small cards so you do not waste yarn.

Who it's for
Anyone who already has a needle and a smooth jar.
Honest downside
Your sweater is cotton or synthetic. Match the fiber to the garment.
Check price on Amazon

As an Amazon Associate I earn from qualifying purchases. We don't show prices because they change, so use the button to see today's price.

How we picked: How we picked: this page is based on mending and knitwear care guides, directions from darning kit makers, and the problems and fixes owners report in reviews. We do not test products by hand.

How to repair sweaters: match the repair to the damage

  • Small hole, under about 2 inches: darn it as above.
  • Snag or pulled loop: pull it to the inside of the sweater. Do not cut it.
  • Split seam: sew it with small, close stitches along the original seam line.
  • Thin spot before it opens: reinforce it with Swiss darning, which copies the knit stitch over the thin area.
  • Big hole or open elbow: darn it larger on the mushroom, or add an iron-on patch inside.

What to skip

Sewing thread on stretchy knit

Thin sewing thread cuts into knit loops, does not stretch with the sweater and shows as a hard line. Use yarn. Also skip trimming the hole into a neat shape. Cut loops unravel.

Frequently asked questions

How do I repair a sweater hole with no sewing skill?
Darn it. You only need a blunt needle, yarn and something round under the hole. The weave is over, under, over, under. Keep stitches loose and the knit will not pucker.
How do I fix a moth hole in a sweater?
Wash or dry-clean the sweater first to remove larvae and eggs. Then darn the hole the same way. Store wool in a sealed bag or box so moths cannot return.
Do I need a darning mushroom?
No. A smooth jar or a tennis ball under the hole works. A mushroom is easier to hold and fits under sleeves and tight spots.
What if the hole is at the elbow and keeps coming back?
The knit around it is worn thin. Darn it wider, or add a patch on the inside. Swiss darning over the thin area also reinforces it before it opens.

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Beginner darning kit (illustration)
Illustration

Our pick: Beginner darning kit

Check price