Democratizing Bespoke Pattern Cutting Precision
We believe that professional garment fit should not require a £10,000 CAD workstation license or a 4-year tailoring apprenticeship.
Bridging Traditional Craftsmanship & Browser Mathematics
For over a century, pattern cutters developed intricate geometric systems to translate 3D human anatomy into 2D fabric pieces. Master patternmakers like Winifred Aldrich and Helen Joseph-Armstrong codified rules for dart suppression, armhole scye depths, and crotch curve balance.
However, legacy fashion software locked these principles into closed, proprietary desktop software that costs thousands of pounds and runs on obsolete Windows interfaces.
sloper.fit was founded by garment technologists and software engineers to re-implement classic pattern making algorithms as high-performance, client-side browser math.
Winifred Aldrich Metric Standards
Every foundation template adheres strictly to published British metric standards, ensuring seamless compatibility with international fashion design curricula.
1:1 Physical Scale Integrity
Zero tolerance for printer distortion. Every exported PDF includes a 100mm verification test box to guarantee 100% scale fidelity.
Open File Standards (ASTM D6673)
No vendor lock-in. Download open DXF, SVG, and PDF formats freely usable in CLO3D, Illustrator, Inkscape, or industrial cutting plotters.
Frequently Asked Questions
Everything you need to know about our free pattern templates and app studio.
Are the 70 pattern downloads completely free?
Yes, all 70 graded foundation slopers (UK 6 to UK 18) are 100% free to download in A4 PDF, 1:1 SVG, and ASTM D6673 DXF formats with no credit card or account required.
Can I use these patterns for commercial apparel production?
Yes! You are completely free to use these foundation slopers to draft, cut, sew, and sell commercial clothing collections and bespoke custom orders.
How do I verify the print scale on my home printer?
Sheet 1 of every PDF download has a dedicated 100mm × 100mm (4 × 4 in) calibration box. Measure this box with a ruler after printing. If it measures exactly 100mm, your print settings are correct.
What is the difference between sloper.fit and app.sloper.fit?
sloper.fit is our web library of free standard size templates, tutorials, and CAD documentation. app.sloper.fit is our browser-based CAD studio where you can input custom client measurements and adjust pattern geometry parametrically in real time.
Start Drafting with sloper.fit
Download free foundation slopers or test our parametric CAD studio today.