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MEASUREMENT GUIDE · LEG LENGTH

How to Measure Leg Length
— Greater Trochanter to Ankle with Spans

May 4, 2026 · FITME Measurement Guide

Leg length is one of the strongest indicators of body proportion. Measuring upper leg (thigh) and lower leg (calf) separately gives you both the data for pants fit and your leg-to-torso proportion ratio. The starting reference point is the greater trochanter — the lateral hip bone.

Leg length measurement guide — greater trochanter to ankle in two steps

Finding Your Greater Trochanter (Reference Point)

REFERENCE POINT
Locate the greater trochanter — the lateral hip bone
Run your hand down the outer side of your hip. You'll feel a bony protrusion — that's the greater trochanter (top of the femur). It sits on the outer hip, just below the waist. This is your starting reference point for all outer-leg measurements.

Step 1 — Upper Leg (Greater Trochanter → Above Knee)

STEP 1
Sit down — thumb at greater trochanter, count to knee
Sit in a chair. Place your span's thumb at the greater trochanter on the outer leg. Count how many spans fit down to just above the knee. Measure along the outer leg (outside of thigh).
Upper leg spans × span cm = Thigh Length
e.g. 2.5 spans × 18cm = 45cm

Step 2 — Lower Leg (Below Knee → Ankle Bone)

STEP 2
Below knee to inner ankle bone
Place your thumb just below the knee and count spans down to the inner ankle bone (medial malleolus). Measure consistently along the same side of the leg throughout.
Lower leg spans × span cm = Calf Length
e.g. 2 spans × 18cm = 36cm
💡 Total leg length (outer) = thigh + calf. A leg-to-height ratio above 52% places you in the top 15% for leg proportion.

Why Leg Length Matters for Proportion Analysis

Leg-to-torso ratio is one of the most powerful indicators in body proportion analysis. People with longer legs relative to their height appear slimmer and carry any silhouette more elegantly. FITME uses this ratio to recommend bottom styles: high-waist cuts to visually extend the leg line, flare to balance wider hips, or cropped proportions to create visual contrast.

Note: if you need inseam length for pants shopping, measure from the inner crotch to ankle. But for proportion analysis, the outer measurement (greater trochanter to ankle) is the correct reference.

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