Most body shape quizzes ask you to look in the mirror and pick the silhouette that seems closest. That is the least reliable way to do it: people are famously bad at judging their own proportions, and the shapes differ by only a few inches. Four tape measurements and some simple arithmetic will tell you far more accurately.
This guide explains how to measure, gives the exact rules for each of the eight shapes, and works through an example. If you just want the answer, the body shape calculator does the arithmetic and draws a dress form to your proportions.
Taking the four measurements
Use a soft tape measure, keep it level all the way round, and measure over underwear rather than clothes. Breathe normally; don’t pull in.
- Bust — around the fullest part of your chest, with the tape level across your back.
- Waist — the narrowest point of your torso. If you’re not sure where it is, bend sideways: the crease that forms is your natural waist.
- Hip — the fullest point around your hips and seat, usually 7–9 inches (18–23 cm) below your waist.
- High hip — across the top of your hip bones, about 3 inches (7–8 cm) below your waist.
The high hip is optional, but don’t skip it if you can help it. It is the only measurement that separates two shapes that otherwise look identical on paper.
The rules for each shape
The classification used here is the Female Figure Identification Technique (FFIT for Apparel), developed at North Carolina State University and widely used in clothing-size research. It compares your measurements with each other, not with a standard, which is why your dress size tells you nothing about your shape.
The thresholds below are in inches, with centimeters in brackets.
| Shape | The rule |
|---|---|
| Apple (oval) | Waist is equal to or larger than bust or hip |
| Hourglass | Bust and hip within 3.6 (9.1) of each other, and bust − waist ≥ 9 (22.9) or hip − waist ≥ 10 (25.4) |
| Rectangle | Bust and hip within 3.6 (9.1), but the waist difference is smaller than the hourglass needs |
| Spoon | Hip − bust ≥ 3.6 (9.1), hip − waist ≥ 7 (17.8), and high hip ÷ waist ≥ 1.193 |
| Bottom hourglass | Hip − bust ≥ 3.6 (9.1) and hip − waist ≥ 9 (22.9), but not a spoon |
| Pear (triangle) | Hip − bust ≥ 3.6 (9.1), with hip − waist under 9 (22.9) |
| Top hourglass | Bust − hip ≥ 3.6 (9.1) and bust − waist ≥ 9 (22.9) |
| Inverted triangle | Bust − hip ≥ 3.6 (9.1), with bust − waist under 9 (22.9) |
The order matters: the rules are checked from the top, and the first one that fits is your shape. Apple is checked first, because when the waist is the widest measurement, nothing else applies.
A worked example
Say your measurements are:
- Bust 36 in
- Waist 28 in
- Hip 40 in
- High hip 34 in
Step through the rules:
- Apple? The waist (28) is smaller than both bust and hip. No.
- Hourglass or rectangle? Bust and hip differ by 4 inches, which is more than 3.6. Neither.
- Hip-dominant shapes. Hip − bust is 4, so you’re in this group. Hip − waist is 12, which clears the 7-inch bar for a spoon. High hip ÷ waist is 34 ÷ 28 = 1.214, which is above 1.193. This is a spoon.
Now take away the high hip measurement. Without it, the spoon rule can’t apply, and the same person drafts as a bottom hourglass, because hip − waist (12) is over 9. That is why the high hip matters: these two shapes need different rises and different waistband construction, and you can’t tell them apart from the other three numbers.
Why the mirror gets it wrong
Three things trip up visual self-assessment:
- Size hides proportion. A larger body and a smaller body can be exactly the same shape. Shapes describe how your measurements relate to each other, not how big they are.
- Where you carry fullness matters more than how much. A bottom hourglass and a pear both have bigger hips than bust. The difference is the waist, which is hard to judge by eye.
- Familiar labels pull you in. “Hourglass” gets used loosely to mean curvy, and “pear” to mean anyone with full hips. The real definitions are narrower.
What to do with your result
Once you know your shape, the useful information is practical:
- Which garments fit off the rack, and which will always need altering.
- Which alterations are worth paying for. For an hourglass, taking in a waist is cheap and reliable. For an inverted triangle, narrowing a shoulder seam is a real alteration and worth it. For a spoon, waistbands are the recurring problem.
- Which cuts work with your proportions rather than against them.
Each shape page covers those in detail. Start with the calculator, which shows which rule matched your numbers, then read the guide for your shape.
One last point: a body shape is a description, not a verdict. It tells you what a pattern needs to do to fit you, which is all a garment ever responds to.