For independent sewing-pattern designers

Grade every size from the one you drew.

Keep drafting your base size in Illustrator, Inkscape or Affinity. Open it here, set your grade rules once, and download layered PDFs for every size: print-at-home, copy shop and projector.

Try it with the demo pattern Join the pilot

Runs in your browser. Your pattern files never leave your computer.

A bodice back and a sleeve graded into eight sizes, XS to 4XL, drawn nested on top of each other — The demo pattern graded XS–4XL: a 2″ grade, with a 3″ grade from XL up.

How it works

Open your base size

Export the size you drafted as an SVG. No renaming or special layers: pieces, stitching lines, seam allowance, grainlines, fold edges and notches are recognised from the drawing, and you can correct anything with a click. Your test square sets the real size.
Set your grade rules

Click the grade points on each piece (shoulder tip, underarm, waist…) and enter how far each moves per size. Start from the built-in 2″-grade rules, use bigger steps for larger sizes, and save your own rules to reuse on the next pattern. Every size is previewed nested as you go.
Download the print files

One click per format. Every file has a layer per size, so sewists can print only theirs. When a piece has both a stitching and a cutting line, the stitching line is graded and the seam allowance added back, as pattern graders do it.

The files you get

Print at home

US Letter and A4, tiled with overlap, trim lines and labelled alignment marks, plus an assembly map. Page 1 tells sewists to print it alone at actual size and check the 1″ and 5 cm test squares first.

Copy shop

A0 sheets for print shops outside the US, and a single 36″-wide roll for US print shops.

Projector

One true-scale page with thick lines and switchable 5 cm and 1″ calibration grids.

Layers by size

Each size is its own PDF layer, plus an “All sizes & info” layer for labels, grainlines and marks.

See the output before you try your own file

These were made from the demo pattern by the app itself:

Open the PDFs in Adobe Reader to switch the size layers on and off.

Your patterns stay yours

Everything happens in your web browser: reading your file, grading, and making the PDFs. Nothing is uploaded, and there are no accounts. Your work is kept in your browser, and you can save it as a project file to back it up or move it to another computer.

Join the pilot

We're looking for a few independent designers to try it on a real pattern and tell us what works and what doesn't. It's free during the pilot, and pilot designers get their first 3 months free when it launches, then half price for the rest of their first year. You'll need a pattern drawn in Illustrator, Inkscape or Affinity, with a test square on the page.

Email us to join

Questions

Which drawing programs work?: Adobe Illustrator, Inkscape and Affinity Designer, through their SVG export. Other programs that export SVG may work too.
Do I have to rename layers or prepare my file?: No. Pieces are recognised from the shapes. Names in your file are used as hints, and you can correct anything with a click.
Is this automatic scaling?: No. Uniform scaling distorts fit. You set grade rules at grade points, as pattern graders do, and the outline between them follows smoothly.
Can I use different steps for larger sizes?: Yes. Any step between two sizes can have its own increments (a size break), for example a 3″ grade from XL up.
Does it add seam allowance?: If your piece has a stitching line and a cutting line, the stitching line is graded and the cutting line rebuilt with your seam allowance. Adding seam allowance to a file drawn without it is planned.
Does it replace my drawing program?: No. You keep drafting in your own program. This takes over the grading and the print files.
What does it cost?: It's free during the pilot. After launch it will be a subscription; pilot designers get their first 3 months free, then half price for the rest of their first year. Print files you download stay yours.