WS — Wrong side (Abbreviation)

WS stands for "wrong side" — the inner or less visible face of the fabric, the counterpart to RS (right side). A pattern's "WS: p to end" tells you which face you should currently be looking at as much as what stitch to work.

Why wrong-side instructions often flip the stitch pattern

A knit stitch worked from one side is physically the same loop as a purl stitch worked from the other — which is exactly why WS row instructions so often flip what a chart's symbols mean at that point. See reading a knitting chart for how that reversal actually plays out square by square; it's real, deliberate work to track correctly, not a "read every row the same" situation.

A common source of mistakes

Working a WS row as if it were an RS row (or vice versa) — usually from losing count after a distraction — is one of the more common ways a stitch pattern goes visibly wrong partway through a piece. If a repeat suddenly looks shifted or reversed from where it should be, checking whether a row got worked on the wrong side is a reasonable first thing to check before assuming a more complicated error.

Where it shows up

Row-by-row written instructions ("Row 1 (RS): ...", "Row 2 (WS): ..."), and chart keys that specify how a symbol's meaning changes between RS and WS rows.

Related abbreviations

• RS — right side, WS's direct counterpart

FAQ

Is WS always the purl-dominant side of the fabric? Only for plain stockinette specifically — for other stitch patterns (garter, seed stitch, many textured patterns), WS simply refers to whichever face the pattern designates as the inner one, independent of whether it looks bumpier or smoother.

Does every row-based pattern label rows as RS or WS explicitly? Most do, especially for anything beyond the simplest stitch patterns, since the labeling removes ambiguity about which face you should be looking at — a pattern that omits this labeling is generally assuming a simple, symmetrical stitch pattern where the distinction doesn't functionally matter.