Why body zones matter for fit prediction
A garment isn't one thing. A dress has a neckline, a shoulder construction, a bust fit, a waist shape, a hip silhouette, and a hem length. Each of these interacts with a different part of your body independently.
A dress can fit perfectly through the shoulders and feel wrong at the waist. A top can be ideal for your bust but too tight in the arms. Treating a garment as a single entity — one size, one fit — ignores these independent interactions.
That's why our AI sizing breaks every garment down into six body zones. Each zone is analyzed separately, and each zone is matched to the corresponding part of the shopper's body.
The six zones
Shoulders. How wide is the shoulder seam? Is it set-in, dropped, or raglan? Does the garment extend past the natural shoulder or sit right on it? For shoppers with broader or narrower shoulders, this determines whether a top looks intentional or accidental.
Arms. Sleeve length, sleeve width, armhole depth. A fitted sleeve on someone with fuller arms feels restrictive. A cap sleeve on someone with broader shoulders can pull. These details matter more than overall size.
Bust. Neckline shape, bust darting, front panel construction. A V-neck on a fuller bust sits differently than on a smaller one. A high neckline that looks elegant on one body can feel constricting on another. The bust zone has the most variation of any zone.
Waist. Fitted, semi-fitted, relaxed, or empire. Where the garment's waist hits relative to the natural waist. Whether it cinches, drapes, or floats. For many shoppers, this is the zone that makes or breaks a garment.
Hips. How the garment falls past the waist — does it skim, hug, or flare? Pencil skirts, A-lines, and straight-leg pants all interact with the hip zone differently. The relationship between hip width and garment silhouette determines comfort and appearance.
Legs. Inseam, rise, leg opening, hem length. For pants this is critical. For dresses and skirts, it's about where the hem falls relative to the knee, calf, or ankle. Length proportions vary dramatically between bodies of the same height.
48 garment features across six body zones
Within each zone, we analyze multiple specific features. Across all six zones, that adds up to 48 distinct garment characteristics. Each one is extracted automatically from product images — no manual tagging required.
These 48 features form a detailed picture of what a garment actually does. Not what size it is, but how it's constructed, where it fits closely, where it flows, and how it will interact with different body types.
From body zones to size recommendations
When a shopper clicks "Made for me?", we don't ask them about all 48 features. We identify which features matter most for that specific garment and ask 3-6 simple yes/no questions about the relevant body zones.
If a dress has a fitted waist and a V-neckline, we ask about waist preference and neckline comfort. We don't ask about sleeve width if the dress is sleeveless. Every question is relevant because every question maps to a specific feature of that specific garment.
The result is an honest answer. This garment works for your body across the zones that matter, or it doesn't. And if it doesn't, we show alternatives that will.
Frequently asked questions
- What are the six body zones Sixfit analyzes?
- Sixfit breaks every garment down into six independent body zones: shoulders, arms, bust, waist, hips, and legs. Each zone is analyzed and matched separately, because a garment can fit perfectly in one zone and feel wrong in another. A dress can sit well on the shoulders but pinch at the waist; a top can be ideal for the bust but too tight in the arms. Treating fit zone-by-zone captures these independent interactions.
- How does Sixfit's AI sizing predict garment fit?
- It analyzes 48 distinct garment features across the six body zones — things like shoulder seam construction, sleeve width, neckline shape, waist position, hip silhouette, and hem length. These features are extracted automatically from product images with no manual tagging. The features describe what a garment actually does: where it fits closely, where it flows, and how it will interact with different body types.
- Why does fit need to be analyzed zone by zone?
- Because a garment isn't one thing. A dress has a neckline, shoulder construction, bust fit, waist shape, hip silhouette, and hem length, and each of these interacts with a different part of the body independently. Reducing all of that to a single size label hides where a garment will and won't work. Zone-by-zone analysis surfaces the specific interactions that determine whether a garment is comfortable and looks right.
- How many questions does the fit finder ask?
- Three to six simple yes/no questions per garment. We don't ask about every one of the 48 features — we identify which features matter most for the specific garment and ask only about the relevant zones. If a dress has a fitted waist and a V-neckline, we ask about waist preference and neckline comfort. We don't ask about sleeve width if the dress is sleeveless.
- What happens if a garment isn't right for my body?
- The fit finder gives an honest answer instead of forcing a recommendation. If the garment doesn't work for your body across the zones that matter, we say so — and show alternatives that will. The goal isn't to push every shopper through to a purchase. It's to tell them whether this specific garment is a match, and to redirect them when it isn't.