Body Shape Index
Explore your proportions. See your silhouette.
Your silhouette profile
Bust and hips are within the studio balance band; the waist does not meet the hourglass rule.
No photograph is needed. The estimate uses the circumference measurements you enter.
See the rules behind your resultYour proportion sketch
Female profileCircumferences guide an illustrative outline. Width, depth, posture and body shape cannot be reconstructed from these measurements alone.
Measurements at a glance
Bars share a relative circumference scale. They are not health-risk bands.
Calculation & assumptions
Waist narrowing = 100 × (1 − waist ÷ comparison circumference)
Vs bust: 100 × (1 − 70 / 90) = 22.2%. Vs hips: 100 × (1 − 70 / 95) = 26.3%.
Our silhouette rules, in order
Studio heuristics for styling. These thresholds are editorial choices, not FFIT implementation or validated medical standards. Equality stays in the less-dominant/balanced band unless specified.
- Both profiles: if natural waist / max(bust-or-chest, full hips) ≥ 0.90, use Apple / Oval.
- Female: if hips / bust > 1.10, use Pear. If bust / hips > 1.10, use Inverted Triangle.
- Female, remaining balanced proportions: if waist / min(bust, hips) ≤ 0.75, use Hourglass; otherwise Rectangle.
- Male, with shoulder circumference: upper = shoulders. Without it: upper = chest, and V-Shape/Trapezoid are not assigned.
- Male with shoulders: if upper / hips ≥ 1.20 and waist / upper ≤ 0.75, use V-Shape. Otherwise, if upper / hips > 1.10 and waist / upper ≤ 0.85, use Trapezoid.
- Other male proportions: upper / hips > 1.10 gives Inverted Triangle; hips / upper > 1.10 gives Triangle; otherwise Rectangle.
High hip changes the sketch only. Negative narrowing means the waist is larger than the comparison circumference. No intermediate rounding. Small tape-placement differences can change a label near an editorial cutoff.
Measurement landmarks
Bust/chest: around the fullest part, tape level. Natural waist: the torso’s natural waistline for styling. Full hips: the widest hips and buttocks. High hip: around the upper hips, used only for the sketch. Shoulder circumference: around the shoulders and upper torso, never a straight shoulder-width measurement.
For the separate health waist, use the midpoint between the lowest ribs and the top of the hip bones after a natural breath out. The styling waist is not automatically reused for WHtR.
Frequently asked questions
Is this the same as ABSI?
No. This is a styling silhouette studio. A Body Shape Index (ABSI) uses waist, height and BMI for a different research purpose. The tools are not interchangeable.
Why might another site give a different shape?
Body-shape systems use different measurements and thresholds. This studio publishes its own heuristic rules. The result is a styling description, not a clinically validated label or a judgement of appearance.
Can the sketch show my actual body?
No. Circumferences do not identify front width, depth or posture. The sketch is a simplified visual comparison of the ratios you enter; it is not a body scan.
Do I need shoulder or high-hip measurements?
No. Bust/chest, natural waist and full hips are enough for a basic estimate. High hip refines the sketch. In the male profile, shoulder circumference enables the studio’s V-Shape and Trapezoid rules.
Does an Apple or Oval label mean I am unhealthy?
No. Silhouette names do not diagnose a condition or measure body fat. Optional WHtR uses a separate measurement site and must be interpreted in the appropriate adult context.
Sources & References
Our heuristic thresholds, published above.
Research on FFIT reliability and measurement definitions.
NG246 · Waist-to-height ratio in eligible adults.
Research informs the limitations; it does not validate this studio’s silhouette rules. NICE applies only to the separate WHtR context. No institutional endorsement.
Explore your proportions. See your silhouette.