Full Transparency
We believe trust is built through transparency. Here is exactly how our algorithm works, what standards we apply, and how we validate every pattern before it reaches your hands.
52
Pattern Types
79+
Style Combinations
5
DAG Engine Phases
100/100
Unit Tests Passing
Engine Architecture
Our engine is built on the Müller & Sohn drafting system, the global standard for professional pattern making since 1891. Every point, curve, and dart is computed from interlinked geometric formulas — no linear scaling.
Unlike software that runs sequential scripts, our engine models patterns as a dependency graph. When a measurement changes, only the affected subgraph is recomputed — guaranteeing real-time performance.
Sleeve cap curves are solved via Newton iteration to match armhole length exactly. Darts use slash-and-spread transformation with rotation around the apex. Precision is ±0.2mm.
Before every export, the engine verifies that each piece forms a closed non-self-intersecting contour, that paired seams meet length tolerances, and that seam allowances don't self-intersect.
Quality Pipeline
Every pattern starts with verified M&S formulas: neckline width = neck circ / 6, armhole depth = bust / 8 + 6.8cm, etc.
96 unit tests verify absence of self-intersection, aberrant angles, tiny segments, and area coherence. Every piece is validated against a structural manifest.
Front armhole length must match back armhole + sleeve cap within ±1.5mm tolerance. These contracts are verified automatically.
Every generated pattern produces a unique integrity hash. The same measurement set always produces the same pattern — guaranteed reproducibility.
Export Formats
| Format | Description |
|---|---|
| PDF A4/Letter | Tiled with alignment marks, calibration, assembly map |
| PDF A0 | Large format print at a copy shop |
| Projector PDF | Dark background, thick lines, 10cm × 1 inch calibration gridrid |
| DXF | Import into Gerber, Lectra, Optitex, CLO3D |
| SVG | High-resolution vectors for illustration |
| CLO3D | Direct 3D simulation compatible |
| Tech Pack | Professional manufacturing tech sheet |
Our engine integrates essential morphological corrections that competing software ignores:
Isolates cup depth from global measurements. Cups A through F.
Reduces excess bodice fabric for cups < B.
Erect, stooped, or swayback. Adjusts back and front automatically.
No Google Analytics, no Facebook pixels, no ad tracking.
Your measurements are never used to train AI models.
Delete your account and all your data at any time, no questions asked.
The Team
DraftMySize was born from a shared frustration: why is industrial CAD inaccessible to independent creators? We rewrote the entirety of pattern drafting algorithms.
Founders
Software Engineers & Model Makers
Inspired by the Open Source philosophy of FreeSewing, we document our algorithmic choices. No black boxes. Your pattern is the result of strict, verifiable geometry.
Corporate Information
For any questions regarding your orders, refunds or technical assistance, feel free to write to us.
contact@draftmysize.comThe classic T-shirt is 100% free — export it in all formats to verify our quality yourself.