Replace Worn Elastic in Cuffs and Waistbands
By TaVare · updated 2026-07-29
Replacing worn elastic in a cuff or waistband is one of the easiest repairs to do yourself – once you know whether the elastic runs through a casing or is sewn straight onto the fabric. Slack, wavy or cracked elastic lets trousers slip down and cuffs stand out, but the garment itself is usually fine; it is only the elastic that has lost its spring. Here is how to recognise perished elastic, replace it step by step and choose the right type and length.
How to recognise worn-out elastic
Elastic has a limited life, even when the garment is otherwise as good as new. The signs are clear: the waistband goes slack and no longer holds you in, the fabric ripples instead of gathering evenly, or the elastic cracks and crumbles when you stretch it. You'll find the same failure in trouser and skirt waistbands, in sleeve cuffs and jacket hems, and in the elastic around gloves and mittens. Why does elastic die? It ages on its own, but high heat from the tumble dryer, hot washes and ironing, plus chlorine and sweat, break it down far faster. That is why elastic exposed to heat is the first to fail.
Two kinds of elastic – two ways to replace it
Before you start, work out how the elastic is fixed, because it decides the method. In the most common setup, the elastic sits loose inside a casing (a channel) in the waistband or cuff – you replace it by opening a little of the seam, pulling out the old and threading in a new length. In the other setup, the elastic is sewn straight onto the fabric, often visible, as on activewear and some cuffs – there you cut off the old and stitch on a new one while stretching it to fit, using a zigzag or stretch stitch. One important distinction: a ribbed knit edge on a jumper is not inserted elastic, but the knitted garment itself. It isn't 'replaced' the same way, and belongs to a different kind of repair.
How to replace elastic in a waistband or cuff
The casing method is the simplest and suits most trouser and skirt waistbands. You only need a safety pin or bodkin, scissors and some new elastic.
- Open a short section of the seam where the elastic sits in the casing – ideally where there is already a join.
- Cut the old elastic and pull it out. Measure the new length against the body part (waist, wrist or ankle) with comfortable stretch – not against the wide opening.
- Attach a safety pin or bodkin to one end of the new elastic and feed it all the way through the casing. Pin the other end so it doesn't disappear inside.
- Make sure the elastic does not twist inside the casing as you go.
- Overlap the ends slightly and stitch them firmly together – ideally with a box stitch – so the join holds.
- Distribute the gathers evenly around the whole band, and sew the seam opening closed.
Choose the right elastic and length
The result stands or falls on choosing the right elastic and measuring the length correctly:
- Width: match the width of the old elastic, so it fits the casing and gives the same look.
- Type: woven 'no-roll' elastic holds its shape best in waistbands; braided or knitted elastic is softer and suits light garments and cuffs.
- Length: measure around the body part with a little comfortable stretch – the elastic should be shorter than the opening itself, or it won't hold.
- Avoid twisting the elastic as you thread it through the casing.
- Join the ends by overlapping and stitching firmly – a clean, flat join doesn't chafe against the skin.
Send it to us
If the elastic sits in a complex waistband, it is a ribbed knit edge that needs re-knitting or taking in, or you have several garments with worn elastic? Then you can send them to us. We replace elastic in waistbands, sleeves and cuffs according to the garment and its fabric, so the shape returns and the garment stays in use. You order online anywhere in Norway, and you see the price before you order.
You see the price before you order.
Frequently asked questions
Why does elastic lose its stretch?+
Elastic ages on its own, but high heat from the tumble dryer, hot washes and ironing, plus chlorine and sweat, break it down faster. It then goes slack, wavy or cracks – and the waistband no longer holds you in.
How long should the new elastic be?+
Measure around the body part – waist, wrist or ankle – with a little comfortable stretch, not around the wide opening. The elastic should be shorter than the opening to gather the fabric evenly.
Is a worn ribbed edge on a jumper the same as elastic?+
No. A ribbed knit cuff or hem is the knitted garment itself, not inserted elastic. It isn't replaced the same way – there it is about re-knitting or taking in, which is often a job for professionals.
Can I stop the elastic perishing again?+
Yes, largely: air-dry instead of tumble drying, wash at a low temperature, and avoid ironing straight over the elastic. Heat is what wears the stretch out most over time.
Rather have us handle it?
You see the price before you order.