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Home » Sewing » Learn To sew

How To Sew A Dart - On Anything!

May 7, 2021

How to sew a dart. Are you new to bag making? Here's everything you need to know to sew darts, on anything - especially bags. And if you are a beginner, this dart sewing tutorial will make it so easy for you!

how to sew a dart

This tutorial includes affiliate links (thanks for your support!) and is part of the ApleGreen Cottage learning-to-sew page. Check out all my sewing tips here, especially these how-tos:

  • How To Make Bag Straps - Adjustable!
  • How To Add Easy Zipper Tabs (These Will Make All Your Bags Look Cute!)
  • All About Interfacing (probably No 1 thing in bags!)
  • Everything You Need To Know About Sewing Zippers!
  • or check out this huge list of free bag sewing patterns

How To Sew A Dart

Sewing darts is an easy bag-making technique to learn, but so powerful. They can transform a plain flat square into a beautiful looking bag with just the right amount of space for all your necessities. Like here:

how to sew a dart
What is a dart in sewing?

Simply put, a dart is a fold you make in a piece of flat fabric and then sew it, which will give your fabric a bit of a dimension. Typical for garment sewing, and an amazing technique you can use on all types of bags (easiest dart type: here) and when sewing pouches. Also, when making rounded items like this popular free seam roll pattern.

Where to place darts on bags?

Darts were traditionally used on the garment, but can be used just as well on bags - with an amazing effect! On bags, darts often appear along the bottom edge, the side edges, or in bottom corners, as a fancy version of boxed corners. So many options - see the tutorial!

This simple drawing will make it clear:

dart sewing on bags

Adding a dart, you can retain a slim form of a bag, adding just a bit of dimension, so the bag can carry more than you'd think. Check out this pattern: I used in my Sophia Fold-Over Clutch And Bag pattern (more here) and it is so practical:

small pink clutch made with AppleGreen Cottage sewing pattern
Detail from the Sophia Bag Pattern, sewn by Ulrike at The Busy Sewing Room

I love it how just a few elements can do it all in bag design. Like these darts, such little things but so powerful in creating space.

clutch pattern with darts

How To Sew A Dart - Tutorial

You will need the piece of fabric on which you'd like to sew a dart. On bags, darts often appear along the bottom edge or in bottom corners, as a fancy version of boxed corners. Once you do that, you'll see how many possibilities for your bag design this will open!

Let's say we want to make the bottom corners of a bag appear fuller, give it some body and structure. Two darts will do just that!


Step 1 - Get Your Bag Pieces Ready For Sewing A Dart

So, you need the two pieces that will form the bag outer. These two pieces should already have any required interfacing, or fusible fleece applied. (See here a guide on fusible interfacing, not rocket science but so good to know when you're starting to sew!)

how to sew dart

Darts will usually be marked on the pattern piece, that is, if you're working with a pattern. If you are working on squares or rectangles, your own measurements, you'll need to set the place for the dart yourself. One of the easiest solutions is placing the dart into the corner, and going diagonally towards the other corner of the fabric piece. Like this:

dart sewing how to
Detail from the Sophia Fold-Over Bag Pattern

Step 2 - Transfer the Darts from the Pattern Piece

Before you start sewing darts, either draw or trace the darts from the pattern piece - on the wrong side of the fabric pieces, of course. Use a disappearing marker like this one (if you're not making a pause, as it will disappear quite fast!)

transfer dart from pattern

Step 3 - Fold Along the Dart Midpoint

Fold the dart and match up the two lines of the dart. Stick a pin into the dart point (marked by a small circle on the pattern piece), and then add a few pins perpendicularly to the line:

how to sew a dart

Step 4 - Stitching the Dart

NOTE: Do not use pins if you are working with faux leather, use sewing clips instead.

Now, sew along one of the lines you traced onto the fabric, starting at the dart leg (widest part of the dart) and using a shorter stitch length: 

how to sew dart

step 5 - Leave a Tail

Once you reach the dart point, sew off the edge of the fabric and leave a long tail. Do not backstitch to avoid puckering: 

sewing a dart

Step 6 - How To Open a Dart

To reduce bulk, open the dart, cutting on the fold line. Stop a few millimeters away from the dart point: 

how to sew darts

Step 7 - Press

Press the dart open. Done!

dart sewing tips

Bonus Tip For Sewing Darts

To help you with pressing darts, use a ham or a seam roll. Feel free to use my free seam roll pattern HERE to make one.

After Darts: Finish Sewing Your Project

From here onwards, you can proceed sewing and assembling your bag parts, just like you would if the bag had no darts (aka simple zipper pouches, flat totes, etc):

how to sew darts on bags
Detail from the sewing instructions of  the Sophia Fold-Over Bag pattern.

Make sure to save this how-to, so you can remember how to sew darts - any time you need it!

how to sew a dart on bag

Or, if you're wondering where to test your dart sewing skills, check out the Sophia Fold-Over Clutch And Crossbody Bag pattern in my pattern shop, HERE:

bag pattern with darts
Get PATTERN HERE.
how to sew a dart

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