On a kaftan or loose top, a kimono or dolman sleeve has no armhole seam, so the underarm curve becomes the stress point. Specify a smooth curve (or a gusset), a reinforcement method such as tape at the curve, and the sleeve angle. For a dropped shoulder, specify where the shoulder seam sits. Check the fit sample with arms raised.
How is each sleeve cut on a kaftan or top?
The kimono sleeve and the dolman sleeve are cut in one piece with the bodice; the dropped shoulder and the raglan are separate sleeves sewn on. The details:
- Kimono sleeve. The sleeve is part of the front and back bodice pieces. There is no armhole seam. Minerva Patterns describes drafting it by extending the bodice shoulder line out into a sleeve, then drawing the underarm down to meet the side seam.
- Dolman (batwing) sleeve. Also cut in one with the bodice, but deeper. Minerva Patterns calls it a sleeve with “a very low, wide armhole that blends into the body”. From that deep underarm the sleeve narrows to the wrist. The same source says the two names overlap, and that the underarm angle and depth matter more than the label. So put the angle and depth in the spec, not just the word.
- Dropped shoulder. A separate sleeve sewn into an armhole, but the shoulder line sits lower than the natural shoulder (Sew Guide). The seam crosses the top of the arm, not the shoulder point.
- Raglan sleeve. Only as a contrast: it is sewn with seams that run from the neckline to the underarm (NMSU Extension, Guide C-211).
A standard set-in sleeve is different again: its cap is eased into an armhole at the shoulder point. We cover that in sleeve cap ease on woven tops.
Which sleeve puts the load where on a kaftan or top?
A kimono or dolman sleeve puts the load on the underarm curve; a dropped shoulder and a raglan share it along an armhole or raglan seam. The table compares them.
| Sleeve | Seam at the shoulder | Seam at the underarm | Main stress point | Arm movement | Drag and folds |
|---|---|---|---|---|---|
| Kimono | Shoulder-and-overarm seam (or a fold); no armhole seam | One continuous side and underarm seam with a curve | The underarm curve | Set by the sleeve angle; higher angle lifts more | Folds under the arm when the arm is down |
| Dolman / batwing | Shoulder-and-overarm seam (or a fold); no armhole seam | Long, gentle underarm curve into the side seam | The underarm curve, spread over a longer line | Free, at the cost of fabric | The most underarm fabric of the four |
| Dropped shoulder | Shoulder seam, plus an armhole seam below the shoulder point | Armhole seam meets the side and sleeve seams | The armhole seam where it crosses the underarm | Depends on armhole depth and drop | Can add bulk under the arm |
| Raglan | Diagonal seams from neckline to underarm | Raglan seams meet the side and sleeve seams | Along the raglan seams | Depends on the draft | Depends on the draft |
The movement and drag columns for kimono and dolman follow Minerva Patterns; the dropped-shoulder bulk note follows Sew Guide.
Why does the underarm of a kimono-sleeve kaftan split?
The underarm of a kimono sleeve splits because a tight curve takes all the strain, with no armhole seam to share it. When the arm lifts, the fabric under the arm is pulled across the curve. The force gathers at the tightest point. Minerva Patterns says the underarm curve should be smoothed, not left as a sharp corner, “which would be a stress point”.
The curve also runs across the grain. Part of it lies on or near the bias, the 45-degree direction. The bias “has got greater stretch than the straight grain”, and once it has stretched it keeps that shape (Lime Rose). So the underarm seam on a kimono kaftan can grow and distort under load, as well as break.
There are three fixes, and the spec should name one:
- Tape the curve. NMSU Extension says the underarm seam of a kimono sleeve “should be reinforced”, even where no gusset is needed. One method: centre a 7.5 cm length of woven seam tape or twill tape on the underarm curve and stitch it on the seamline.
- Clip, then tape. The Tailoress clips the seam allowance “almost to the seam line at the underarm point” so it lies flat once turned. A clip leaves less fabric holding the seam at the very point that takes the strain. So NMSU pairs it with tape: clip, press open, centre the tape over the allowances, then stitch 3 mm each side of the seamline from the right side.
- Add a gusset. A gusset is a diamond-shaped insert at the underarm. NMSU says it “may be used to reduce garment strain” on narrow kimono sleeves that slope close to the body. Minerva Patterns says a gusset adds fabric “exactly where the arm needs it” without loosening the rest of the sleeve.
A second row of stitching is another way to reinforce a curved seam. Name it in the spec with its distance from the first row, so it is not left to judgement.
Why does a kimono or dolman top show drag lines under the arm?
Drag lines and folds under a kimono or dolman sleeve are the price of having no armhole. The sleeve needs spare fabric below it so the arm can lift. With the arm down, that spare fabric hangs in folds. With the arm up, it is used up, and then the body is pulled.
Minerva Patterns puts it plainly: the more the sleeve angles down, “the less the arm can lift before the whole bodice drags upward”. On a kaftan or top, the hem rises with the bodice. That is the hem “riding up” in a fitting.
So some underarm folds on a kimono or dolman top are not a defect. A pull line from the underarm to the hem when the arm is raised is a different matter. It means the sleeve angle is too low for the movement the garment needs.
How does the sleeve angle change drag and movement on a kimono sleeve?
A higher, flatter sleeve angle gives more arm lift and more folds; a lower, steeper angle gives a cleaner line and less lift. Minerva Patterns describes both ends:
- a high, near-horizontal sleeve “gives lots of arm lift but leaves deep folds of fabric under the arm when the arm is down”;
- a low, steep sleeve “looks clean when the arm is down but pulls and restricts as the arm rises”.
NMSU Extension gives one reference point: a kimono sleeve cut at a right angle to the side seam “provides enough ease for lifting and reaching”. Minerva Patterns adds that a design needing both a close fit and free movement “cannot rely on angle alone” and needs a gusset. For a close kimono top, specify the angle and the gusset together.
What does the weight of a long kaftan do to a seamless shoulder line?
A long kaftan is a lot of fabric hanging from one line.
Viscose and georgette are among the fabrics listed as suited to bias cutting, because they drape (Lime Rose). The same source notes that a bias-cut piece “hangs longer at the hem on one side” as it stretches. Where the kaftan’s sleeve and underarm curve cross the bias, that weight can pull the curve longer. The result is a lower underarm, a longer sleeve on one side, or an uneven hem. Fabric weight and behaviour differ by quality, so test the actual fabric, not the fibre name. Fibre choice for kaftans is covered in polyester georgette kaftans.
Where should the shoulder seam sit on a dropped-shoulder top?
On a dropped-shoulder top, the shoulder seam sits below the natural shoulder point, and the spec should give that drop as a measurement. The drop changes where the armhole seam lands on the arm and how much fabric gathers under it; Sew Guide notes the style “may create unwanted bulk under the arms”. A word like “relaxed” is hard to check on a sample. A number, measured from a fixed point, can.
What should the fit sample check on a kaftan or top with these sleeves?
The fit sample should be checked with the arms raised, not only standing still. Look for three things:
- whether the hem of the kaftan or top lifts, and by how much;
- whether a pull line runs from the underarm to the hem;
- whether the underarm seam, tape or gusset shows strain or seam opening.
Measure the underarm and sleeve length before and after a wash test of the sample, so growth on the bias shows up before bulk. Then hold the bulk to the approved garment at the top-of-production sample. For other seams that pull on a kaftan, see yoke seams on kaftans and blouses.
What to put in the tech pack
- Sleeve type: kimono, dolman, dropped shoulder or raglan, with a sketch.
- Sleeve angle: for kimono and dolman, the angle of the sleeve to the side seam or centre front.
- Underarm: the curve radius, or the gusset shape and size, with notches.
- Reinforcement: tape (type and length), clip-and-tape, or a second row of stitching (distance from the first).
- Dropped shoulder: the shoulder seam position as a measurement from a stated point.
- Grain: the grainline on every piece, so the bias falls where the pattern intends.
- Fit sample check: arms raised; hem lift, underarm pull lines and seam strain recorded; underarm and sleeve length measured before and after a wash test.
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