For designers
Grade it once. Publish every size.
Grading is the part that eats an afternoon and a spreadsheet — and the part where a stranded stitch quietly ruins a size you'll never knit yourself. Skein does the arithmetic, tells you when a size won't work, and hands you pattern language you can paste straight into your draft.
Four constructions
Top-down raglan, circular yoke, set-in sleeve, and drop shoulder — each built from published industry method, not guesswork.
The armscye check
For set-in sleeves, Skein compares the cap edge to the armhole it eases into and reports the ease honestly — the part of set-in design that most often goes wrong.
Sizes XS–5XL
Nine sizes with proper per-size shaping — not one number scaled up. Size-inclusive grading is the loudest demand in modern knitwear.
Yardage estimates
Per-size yarn requirements. Weigh a swatch and enter your ball band for an accurate figure, or get a gauge-based estimate instantly.
Live schematic
A flat measurement diagram drawn from the counts Skein actually produces — so the drawing can never disagree with the instructions.
Workspace & PDF export
Write the pattern with your gauge, sizes, and construction alongside it, then export a clean multi-page PDF for testers or sale.
Every count is a count you'll actually have
That's the rule the whole engine is built on. The size table, the stitch split, and the written instructions are asserted to agree — for every size, on every launch. If a size genuinely won't work, Skein says so instead of printing a number that looks fine and isn't.