Princess seams
are scrumptious.
Everything about them - the smoothness, the neatness, the snugness - I love. I especially love how they make the armscye so ungaping. When I first started sewing them as a teenager, I wanted to put them in every garment I made - bustiers, spaghetti strap sundresses, gowns, everything. It drove my mother crazy.
Drafting them from a regular french-dart sloper, though, was not as straightforwardly Let's-Slash-And-Pivot-The-Old-Dart as the drafting books say it is. There's a lot of fit-refining to do, even up to the shoulder seam. I took in so much almost everywhere that I eventually redrafted the whole thing from scratch again. Either I'd forgotten all I ever knew about princess seams and dart rotation, or I've lost some pounds (unlikely, given the vast amounts of snacking I've been doing this summer), or I don't know how to read drafting books. Or maybe I should just stop reading drafting books.
Anyway, the short term goal of all this was to produce this dress:
Pardon the multitude of creases - we took the photos after a whole day of running after children at a party and- yes, in this dress -playing basketball with them.
Weird expression on face - not sure why, but I do this a lot in photos.
I suspect my most current sloper - the one made in March - is already out of date. There is a lot of ease in weird places that I never noticed before. The scoop neckline required 4 pintucks/mini darts to lie flat - despite my being very, very careful in handling it. Shocking, what just a half inch of unwanted ease in the wrong place can look like.
The long term goal - apart from revisiting my teenhood princess seam obsession -is to sometime sew a winter coat. With top-stitching. Without horrible shoulder pads. I'll need to move the princess seam up to the shoulder. More fit-adjustments. Ho hum. Maybe next winter.
But wanted to introduce princess seams because
Am I making sense? Not really?
Hm, howzabout we do a mini-tutorial on darts?
This is a typical dart for a woman's front bodice.
This kind of dart is called a Chest Dart, because that's the area it opens into. Its function is to enhance the bust area by reducing fullness in the hollow regions surrounding the bust - in this case, the side of the chest. Point A is the bust apex. If you remember from our sloper posts, we always plot the point of the dart a short distance away from the actual apex, to avoid over-conical-ness.Sometimes, we see instead, this kind of dart:

This is called a Waist Dart, because it opens into the waist. It also shapes the bust but by reducing the fullness in the underbust area. When present in a full-body sloper or pattern, it connects to the waist dart in the bottom half (skirt or trousers). Many commercial patterns have this kind of dart.
At the risk of repeating what is in every single drafting book, I will share this sketch:
It shows some of the common positions of this front bodice bust-enhancing dart.1 = Neckline Dart (sometimes spread out over the neckline, sorta like my 4 mini darts in the dress above)
2 = Shoulder Dart
3 = Another variation of the shoulder dart
4 = Armscye Dart
5 = French Dart (favored by more youthful figures with slenderer waists)
6 = Waist Dart
7 = Chest Dart opening into the center front.
Here's the point (pun unintended)- all these darts serve the same function - to enhance the bust area. In other words, you could use any one of those dart positions for your bust dart. Which one to choose depends on several factors, including:
- the kind of garment (jacket, gown, loose blouse, for instance)
- the print of the material - the dart will interrupt the print. Stripes are especially susceptible to this.
- the body shape of the person - the dart is usually positioned where it is most flattering. This often means where the body is most hollow.
The smaller/narrower the dart is, the neater the overall look. Sometimes a wide dart may be split into two darts so that each dart is narrower. Like this combination of Waist and Chest darts:
Or this combination of Waist and Shoulder Darts:
which is especially effective because of its symmetry. I see this a lot on jackets.Now let's talk a little about commercial patterns, which I actually know practically nothing about (so, ooooo! this should be funny). Often, commercial patterns will come with one of these bust darts. When you try on a pattern, you might find that
(i) the bust apex is nowhere near yours
(ii) the dart is the wrong size, darn it
so you will spend some time shifting the bust apex point, and redrawing the dart and adjusting the armscye and waist and side seam. This is annoying but it is a necessary part of fitting a pattern, so it's all good.
Sometimes, you'll want to move the dart to a different position. Maybe you have a favorite pattern whose dart configurations you use without exception on every other pattern. Maybe your body shape is of the sort that favors certain dart positions for modesty and/or vanity. Maybe you're like me and want to make princess seams in everything. Nothing wrong with that.
So we do something called Slash And Rotate or Slash and Pivot:
In brief, it goes something like this (crude sketches below):
- You extend the tip of the dart right to the bust apex.
- You draw the new dart's position.
- You cut open the new dart to almost the bust apex point.
- You close the old dart by rotating the whole pattern about the bust apex.
- You tape the old dart closed.
- You redraw the side seam/armscye so that the lines are smooth and not pointy.
- You admire your new dart and feel clever.

Then, if you are in the Princess Seam Fan Club, you will further
- slice right through the bust apex to separate the bodice into two pieces,
- smooth the edges of the pieces that form the dart and
- dance for joy at your superior and incomparably fabulous princess seam pattern.
Two points about princess seams:
- This particular princess seam originates from the armscye but it can also originate elsewhere, like the shoulder (very common in coats) or shoulder point (very common in dressforms).
- Princess seams are nicest in close-fitting garments. They must run directly over the bust apex or risk looking very daft. So either draft them from scratch or adapt a pattern with zero ease. I've discovered that some companies selling commercial slopers offer two styles - the standard two-dart sloper, and the princess seam sloper. I wonder if it is their interpretation of slopers-with-ease and slopers-without-ease, respectively.
And now that I've gone on and on about darts being supreme and the princess seam being the most streamlined of all fullness-reducing darting techniques, let's break the rules and embrace the other extreme - hellooooooo dartlessness!
Here is that bias-cut linen blouse -
actually being worn!
Look, ma -no darts!
Look, ma -no darts!
The fit is in the bias drape of the fabric itself and a little bit of waist shaping in the side seams. Easy! And comfortable. And not huggy-clingy like knits. And not tentlike, like one might expect from dartlessness. But you'll need to start with either a sloper or a very snug bodice pattern with zero ease. And a good-weight fabric that hangs well and has a good amount of give along the bias, so nothing light like seersucker or quilting cotton or stuff like that. And good foundation garments, so there is actual definition to the bust under all that draping.
Well, that was a little deviation from drafting for children. I thought I'd slip this into our series as a follow up to that last post on drafting for boys, men and women. Incidentally, mum hasn't actually seen this princess seam dress yet - she'll probably roll about laughing, knowing that I've reverted to my bad old ways.
Well, that was a little deviation from drafting for children. I thought I'd slip this into our series as a follow up to that last post on drafting for boys, men and women. Incidentally, mum hasn't actually seen this princess seam dress yet - she'll probably roll about laughing, knowing that I've reverted to my bad old ways.









