The apple measurement pattern
The rule focuses on the waist. When the waist is within 2 in (5.1 cm) of the bust and also within 2 in (5.1 cm) of the hips — or larger than either — the calculator returns Apple. This check runs first, before the other rules.
The bust and hips can be balanced or unbalanced in an apple result. What matters is that the midsection is the widest, or nearly the widest, of the three measurements.
How the classification works
The calculator checks five rules in a fixed order — Apple, Hourglass, Pear, Inverted Triangle, then Rectangle — and returns the first one your measurements meet. The thresholds compare your measurements with each other, so your overall size does not affect the result. After classifying, it also tests whether a change of about 1 in (2.5 cm) in any single measurement would give a different shape, and tells you if so.
You can see every rule side by side on the body shape types overview.
Measurement examples
These examples show how specific numbers are classified, including a near miss for comparison.
Apple versus rectangle
Apple and Rectangle can look similar on paper because both have a less defined waist. The difference is whether the waist is smaller than the bust and hips at all. In a rectangle the waist is still somewhat smaller; in an apple it is about level with them or larger.
The 2 in (5.1 cm) margin used here is this site's own simplification. The original FFIT method describes round shapes differently and some later research adapted its rules for plus-size bodies, because a larger abdomen than bust or hips was otherwise hard to classify.
Body shape is not a health assessment
Waist size is also used in some health screening, which is why apple shapes are sometimes discussed in health articles. Those clinical measurements follow their own measurement procedures and are interpreted by professionals alongside other information.
This calculator is not designed for that purpose and does not tell you anything about your health. If you have questions about your health, a qualified healthcare professional is the right person to ask.
Why waist measurements vary
The waist is the least stable of the three measurements. It can change during the day with meals, breathing, posture and clothing. Pulling the tape tight or holding your breath also produces a smaller reading.
Measure at the natural waist — usually the narrowest point, or roughly midway between the bottom of the ribs and the top of the hip bones when there is no obvious narrowest point — while standing relaxed and breathing out normally.
Common misconceptions
- “Apple is a negative label.” It is a neutral description of proportions. It does not describe attractiveness, fitness or worth.
- “An apple result says something about my health.” No. This calculator compares three circumferences for clothing-style classification. It does not assess health risks.
- “Apple shapes always have a larger bust.” Many apple results have a larger bust, but the rule only requires the waist to be close to or larger than both bust and hips.