A Simple Jeans Hem (Famous Last Words)

My daughter’s boyfriend asked me—very politely—if I could shorten his jeans just a little.

They were brand new and honestly didn’t need much taking up at all.

Because I like him, and because I was in one of those dangerously generous moods, I said yes.

He now owes me a favour — details to be settled in wine.

This decision was made on a Sunday afternoon, fuelled by a wonderful family roast cooked by the ever-wonderful Mr Sparkles. Bellies full, spirits high, I headed to the sewing room with confidence, optimism, and my trusty seam ripper.

What could possibly go wrong?

Step one: investigate

I always start by undoing the original hem to see what I’m dealing with. Different brands finish hems in different ways, and denim loves to hide surprises.

So out came the seam ripper, and off came the factory stitching.

At this point I was reminded of a universal sewing truth:

nothing humbles you faster than brand-new denim.

The fabric was thick. The original hem had been stitched with hefty thread. And there was that inevitable bulky seam where all layers meet and quietly wait to test your patience (and your machine).

Still, this was a straightforward job. Just a small adjustment. No drama.

Reader, I was wrong.

But I was also prepared.

⸻

How I Hem Jeans Without Losing My Mind

If you’re shortening jeans—whether for family, partners, or people you like just enough to say yes—here’s what actually makes the difference.

Use the right needle

A proper denim needle (size 100/16) is non-negotiable.

Fresh needle, sharp point, no mercy for thick seams.

Choose thread wisely

For that classic jeans look:

• Topstitching thread on top - I used Gutermann Denim thread.

• Regular all-purpose thread in the bobbin

If your machine complains, don’t argue with it. Switch tactics.

Lengthen your stitch

Denim needs room to breathe.

• Aim for a stitch length of 3.0–3.5

• Short stitches + thick fabric = misery

Press like you mean it

Press before stitching.

Press after stitching.

Steam is your friend.

A well-pressed hem feeds more evenly and instantly looks more professional.

Deal with bulky seams before sewing

That thick side seam?

• Grade it if you can - I had to cut off additional bound seams made for pleats in the jeans.

• Hammer it gently (yes, really)

• Or steam and flatten it into submission - pressing makes it pretty

Your machine will thank you.

Slow down at the danger zones

Normal fabric? Fine.

Approaching the thick seam? Slow. Right. Down.

I use the hand wheel if needed and a little folded scrap of denim behind the presser foot to keep things level. I do, in fact own a hump jumper - a small piece of plastic that came with my machine for precisely this moment - but it was hiding in one of those very safe places where things go, never to be seen again.

So the denim scrap stepped in.

No racing. No heroics.

Hide your start and finish

I like to start stitching right near the inseam so the join is less noticeable.

• If I want a really clean look, I avoid backstitching and instead pull thread tails to the inside and knot them by hand.

Extra effort. Worth it.

The moral of the story

A “simple” jeans hem is never just simple—but it can be calm, controlled, and quietly satisfying if you go in prepared.

And when it’s finished?

A neatly stitched hem, jeans that fit perfectly, and the warm glow of having done a good deed for someone who will (hopefully) never know how close their trousers came to becoming a cautionary tale.

Be careful not to do too perfect a job, or they’ll ask you again — and suddenly that “favourite wine” information becomes very relevant.

Keep it Sparkly

Sam