To reduce fabric shrinkage caused by sewing, use only as much thread tension as necessary, choose an appropriate needle and thread size, use a longer stitch length for medium-to-heavy projects, and make sure fabric layers feed evenly through the machine. Some shrinkage can still occur as stitches are formed, particularly in tightly woven fabrics.
In this guide, you’ll learn why fabric can draw up or pucker during stitching, which sewing-machine factors can make it worse, and seven practical ways to minimize it. Understanding this type of shrinkage can be useful when preparing fabric for projects from Winslet's or working with any sewing pattern where clean, accurately sewn seams are important.
Why Can Fabric Shrink While You Sew?
Fabric can become slightly shorter or develop ripples along the seam because inserting thread into the fabric can cause the surrounding yarns to draw together.
This effect is sometimes called needle pucker phenomenon.
It is particularly noticeable in tightly woven fabrics. Because the yarns are packed closely together, they cannot easily shift to accommodate the sewing thread being inserted between them.
As stitches are formed, the fabric can draw up along the seam. The result can be:
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Slight shortening of the fabric
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Rippling along the seam
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Visible seam puckering
The amount can vary depending on the fabric and how it is sewn.
Is Fabric Shrinkage During Sewing Normal?
Yes. A small amount of shrinkage or puckering can be a normal consequence of stitching fabric.
The effect does not necessarily mean that something has gone wrong with your project. However, your thread tension, stitch length, needle and thread size, fabric feeding, and number of stitching rows can influence how much puckering occurs.
The goal is therefore to reduce unnecessary shrinkage rather than assume it can always be eliminated completely.
Why Are Tightly Woven Fabrics More Likely to Pucker?
Tightly woven fabrics are more susceptible because their yarns have less room to move when sewing thread is inserted.
In a less restrictive construction, the fabric yarns have more opportunity to shift around the thread. With a tight weave, that movement is limited.
As a result, the yarns can draw together around the stitches, producing a slightly rippled seam and shortening the fabric along the stitched area.
How Can You Reduce Fabric Shrinkage and Seam Puckering?
Control the factors involved in forming and feeding the seam. Thread tension, stitch length, fabric feeding, stitching quantity, and needle and thread size can all affect the result.
Here are seven ways to reduce the problem.
1. Use as Little Thread Tension as Necessary
Reducing excessive thread tension can help minimize fabric draw-up along the seam.
Use only enough tension to pull the bottom knot slightly into the fabric. Avoid applying more tension than the seam requires.
Too much tension can contribute to the fabric drawing together as it is stitched.
2. Use a Longer Stitch Length for Medium-to-Heavy Projects
A longer stitch can help reduce puckering on medium-to-heavy sewing projects.
For the type of sewing demonstrated, a stitch length of 6 mm or more is recommended.
This measurement relates specifically to the medium-to-heavy projects discussed here rather than being a universal stitch-length setting for every sewing project.
3. Keep the Fabric Layers Feeding at the Same Rate
Fabric layers should move through the sewing machine consistently and at the same rate.
Uneven feeding can contribute to an undesirable result along the seam.
Tools that help control the layers can be useful, and a walking-foot sewing machine can also help the fabric feed consistently.
4. Avoid Unnecessary Rows of Stitching
Multiple rows of stitching can increase puckering and shrinkage.
Each additional row introduces more thread into the fabric. Where the construction allows it, avoiding unnecessary stitching can therefore help minimize the amount of fabric draw-up.
5. Use the Correct Needle and Thread Size
Avoid using a needle and thread combination that is larger than the project requires.
An oversized needle and heavy thread take up more space as they pass through the fabric and can increase puckering and shrinkage.
Choose the needle and thread size appropriate to the sewing project rather than automatically using a heavier combination.
6. Use Bonded Sewing Thread When Appropriate
Bonded sewing thread is another option identified for reducing needle puckering in the type of sewing discussed here.
Bonded thread is lubricated, which distinguishes it from an unbonded thread.
7. Consider the Direction of Sewing
Sewing direction can affect the amount of puckering.
Sewing along the warp, or length of the fabric, typically causes more puckering and shrinkage than sewing along the weft or bias.
However, changing the direction of a project is not always practical because doing so can create substantial fabric waste or require additional joins.
This means sewing direction is a factor to understand rather than something you can necessarily change on every project.
A Simple Process for Reducing Shrinkage While Sewing
Before sewing a long or shrinkage-sensitive seam, review the machine setup and construction so unnecessary puckering is minimized.
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Check your thread tension.
Use only enough tension to pull the bottom knot slightly into the fabric. -
Consider your stitch length.
For the medium-to-heavy projects discussed here, a longer stitch of around 6 mm or more can help. -
Check the needle and thread combination.
Avoid using a larger needle and heavier thread than necessary. -
Make sure the layers feed evenly.
Keep multiple fabric layers moving through the machine at the same rate. -
Avoid unnecessary additional stitching.
Extra rows of stitching can increase shrinkage and puckering. -
Consider the sewing direction.
Be aware that stitching along the warp may create more puckering than stitching along the weft or bias. -
Remeasure after sewing when the project allows it.
Complete final cuts or finishing hems only after checking whether the stitched fabric has shortened.
If you'd like to see fabric shrinkage and seam puckering demonstrated on a long sewing project, you can watch the video below.
Should You Make Final Measurements Before or After Sewing?
When the project allows it, remeasure after the main sewing has been completed before making final cuts or finishing hems.
This gives you an opportunity to account for any shortening that occurred during stitching.
In the demonstrated project, a fabric length of approximately 47 feet shortened by about 8.5 inches after a zipper was sewn along its length.
For medium-to-heavy sewing projects of the type demonstrated, the expected loss was described as approximately 1–2% of the fabric length after sewing.
That figure should not be treated as a universal shrinkage allowance for every garment or fabric. The amount of shrinkage varies according to the project and sewing conditions.
What If You Are Sewing From a Pattern?
Pattern-based projects do not always allow you to postpone the final cutting until after construction.
Unlike a long project where you can sew first and make a final cut later, sewing patterns generally require the pieces to be cut to shape before they can be assembled.
For these projects, the demonstrated advice about remeasuring before final cutting cannot necessarily be applied in the same way.
The source also notes that patterned projects are typically much smaller than the long example used to demonstrate accumulated shrinkage.
What Causes Excessive Seam Puckering?
Several sewing choices can increase puckering, including excessive thread tension, an unnecessarily large needle and thread, uneven feeding, and multiple rows of stitching.
If a seam is puckering more than expected, review these variables rather than focusing on only one machine setting.
Check the Upper Tension
Excessive tension is one of the first things to reconsider. In the demonstrated project, reducing the upper tension further was identified as the change that could have improved the final result.
Check Your Needle and Thread
A larger needle and heavier thread can increase the effect. If that combination is not required for the project, a smaller appropriate combination may reduce puckering.
Check How the Fabric Is Feeding
Make sure the fabric layers are moving consistently rather than feeding at different rates.
Check for Multiple Stitching Lines
Additional rows of stitching can add more puckering and shrinkage.
Can You Completely Prevent Fabric Shrinkage From Sewing?
Not necessarily. Some degree of draw-up can be a natural result of forming stitches in fabric.
The aim is to keep it to a minimum by controlling the factors that can make the effect worse.
This distinction is especially important with tightly woven fabrics, where the yarns have limited room to move as the sewing thread is inserted.
Minimize Shrinkage by Controlling the Seam
Fabric can draw up slightly as it is sewn, particularly when working with tightly woven materials. You may not be able to prevent every small change, but appropriate thread tension, stitch length, needle and thread size, even feeding, and thoughtful construction can help keep seam puckering and shrinkage to a minimum.
When working on your next project, explore Winslet's sewing patterns collection and take time to check your sewing setup before assembling your pattern pieces.
FAQs
Why does my fabric shrink when I sew it?
The fabric yarns can draw together as sewing thread is inserted between them. This can shorten the stitched area and create rippling along the seam.
Why is my seam puckering?
Seam puckering can result from the interaction between the thread and tightly packed fabric yarns. Excessive thread tension, large needles and thread, uneven feeding, and multiple rows of stitching can increase the effect.
Can high thread tension cause fabric puckering?
Yes. Use only as much tension as necessary to slightly pull the bottom knot into the fabric.
Can my needle be causing seam puckering?
The needle and thread combination can contribute. A needle and thread that are too large can increase fabric puckering and shrinkage.
Does stitch length affect puckering?
Yes. For the medium-to-heavy sewing projects discussed here, a longer stitch length—typically 6 mm or more—can help reduce puckering.
Does sewing direction affect fabric shrinkage?
It can. Sewing along the warp or lengthwise direction typically produces more puckering and shrinkage than sewing along the weft or bias, although changing the sewing direction is not always practical.
Should I measure my project again after sewing?
When the construction allows it, yes. Remeasure after sewing before making final cuts or finishing hems so you can account for any shrinkage that occurred during stitching.
