Human body and clothing
Clothes are made for the human body, so we must know the body first. The body is not a simple tube. The chest is wide, the waist is narrower and the hip is wide again. The shoulders slope. The arms and legs bend at the elbow, the knee and the hip.
Why this matters: cloth must cover the body, but it must also let us move. We bend, sit, walk and lift our arms. So clothes need ease: a little extra room.
Body measurements. A tailor measures the body with a tape: chest, waist, hip, shoulder width, sleeve length and garment length. Chest, waist and hip are measured round the body. Lengths are measured up and down. Keep the tape flat and snug, not tight.
Bodies are different, and a body changes as a child grows. This is why one fixed size never fits everybody.
3D and 2D composition
Cloth is flat (two dimensions). The body is solid (three dimensions). Composition means how the flat cloth is arranged to fit the body. There are two main ways.
2D composition (planar or flat construction)
Straight, flat pieces of cloth are used. There is little or no curved cutting. The shape appears only when someone wears it: wrapped, folded, tied or belted. The body gives the shape. Examples: kimono, sari, dhoti, lungi, a wrapped skirt.
- Good: simple to cut, little waste, fits many sizes, easy to fold flat and store.
- Limit: loose at the waist, needs tying or tucking, and can slip.
3D composition (solid or shaped construction)
The cloth is cut into curved pieces. Darts (folds sewn to a point), gathers, pleats and seams take the cloth in at the waist and out at the chest. The cloth itself has the shape. Examples: shirt, blouse, jacket, trousers, fitted dress.
- Good: neat and close fit, easy to move in once sized correctly.
- Limit: more cutting, more waste, needs correct measurements, fits only a small range of sizes.
Which to choose?
Many clothes mix both. A kurta is mostly straight pieces, with a curved neckline and armhole. Jeans are shaped. A dupatta is pure flat cloth.
Darts, ease and seams: how shape is made
A dart is a triangle of cloth folded and stitched. It takes away extra cloth where the body curves in, for example at the waist. Ease is extra room so we can move. Gathers (small even folds) and pleats (sharp folds) add fullness. Seams join pieces and can follow body curves such as the side of the waist.
Try it
Do it at home: take a rectangular scarf. Wrap it round a bottle: it is loose where the bottle gets thinner. Pinch a small triangle fold at the thin part and hold it: the cloth now fits. That fold is a dart. In the 3D, move the slider and watch the measurements change.
Key formulas and definitions
- Chest, waist, hip: measured round the body, in cm
- 2D (planar) construction = straight flat pieces; the body gives the shape
- 3D (solid) construction = curved pieces + darts/gathers; the cloth gives the shape
- Garment size = body measurement + ease (extra room)
Worked examples
1. A tailor measures a body: chest 90 cm, waist 72 cm. Where will a straight tube of cloth be loose?
A straight tube must be wide enough for the biggest part it covers, the chest at 90 cm. At the waist the body is only 72 cm, so the cloth has 90 - 72 = 18 cm of extra loose cloth there. A dart (or a belt) removes it.
2. Put these in the right group: sari, shirt, dhoti, blouse.
2D (flat pieces, body shapes them): sari, dhoti. 3D (shaped pieces and darts): shirt, blouse.
3. A skirt waist is cut 100 cm round. Four darts each take in 2 cm. What is the waist size now?
Total taken in = 4 x 2 = 8 cm. New waist = 100 - 8 = 92 cm.
4. Why is a kimono easier to share between people of different sizes than a fitted jacket?
A kimono is made of straight flat pieces and is wrapped and tied, so the wearer adjusts the wrap. A fitted jacket has shaped pieces made for one set of measurements, so it only fits a small range of sizes.
Common mistakes
- Measuring too tight. The tape should be snug, not squeezing. Always leave ease.
- Thinking a flat garment is bad and a shaped garment is good. Each has its own use.
- Mixing up the two names: 2D means flat pieces, 3D means shaped pieces. The finished garment is always worn on a 3D body.
- Measuring chest, waist or hip up and down. These are round-the-body measurements.