In Sewing, what is a Dart?

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  • Written By: A Kaminsky
  • Edited By: Niki Foster
  • Last Modified Date: 25 September 2019
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Sewing involves many techniques that help fabric fit properly to the body. One technique that does this is the dart, which is usually two straight stitch lines that bring together a fold of fabric.

The most common dart is probably the one often seen at the bustline of women’s blouses. This helps the fabric fit to the woman’s curves, so that the fabric does not look wrinkled or baggy. Princess seaming is also a type of dart, but is much longer and often fits an entire dress bodice lengthwise to the torso. A dart may also be placed in the back of a shirt or blouse to take in fullness through the back or to shape the blouse to the shoulders. This type is usually curved, in order to shape the garment properly.

The bustline dart is generally marked on a sewing pattern as a large “A” shape. The sewer marks the stitching lines on the wrong side of the fabric, usually with a fabric marker or tracing wheel. The dart is made by bringing the lines together, which creates a triangular fold on the wrong side of the fabric. The fold can then be pinned into place, and the sewer stitches the fabric together, beginning at the widest part of the dart and going to the point. Care should be taken not to let the stitches or thread pucker, so the dart will be smooth on the outside.


A dart may either be pressed down and to one side, or the fold can be centered over the seam and the excess material flattened out and pressed, making two folds. How the dart is pressed will depend on the garment, fabric and fit. For a shoulder or back dart, the sewer will usually mark curved, rather than straight, lines, and will follow the same construction and sewing directions, always being careful to keep the seam straight and smooth. A sewer should never hurry while making a dart, since these details often mean the difference between a well or poorly fitting garment.

Most sewers learn to make darts in a beginning sewing class. Instructions with pictures are also available online, but the best way to make a first one is usually to do it under the watchful eye of an experienced sewer.


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Post 5

What is another method than darting? What can I do to leave that breast space there without having to dart leaving that seam line?

Post 4

thanks, you helped me with my tech homework.

Post 2

Can anyone help me? I am making a bias cut top. I have a very broad back and very sloping shoulders. Having made the necessary alterations I find that the shoulder dart when in fabric won't lie flat at the point. I don't have this problem on true grain cut garments. I am using a satin backed crepe.

Post 1

Great article. I have seen women's blouses that have what I call an "inverted" dart. Meaning that the triangular fold in on the outside of the blouse. Is this a trend or a faux pas?

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