Yarn Twist Direction Guide

Guide for yarn twist direction

Yarn Twist Direction Guide

Understand S-twist vs Z-twist, how twist direction affects your knitting, and which to use for your project.

S-Twist

Rotation: Clockwise when viewed from above

Effect: Fibers spiral like the center stroke of "S" — clockwise twist

Bias: Stockinette knit in S-twist yarn tends to bias to the LEFT

Best for: Standard commercial yarns, most handspinning, balanced singles

Z-Twist

Rotation: Counterclockwise when viewed from above

Effect: Fibers spiral like the center stroke of "Z" — counterclockwise twist

Bias: Stockinette knit in Z-twist yarn tends to bias to the RIGHT

Best for: Some traditional spinning, balanced plying with S-twist singles

Bias in Stockinette

When you knit stockinette with energized (unbalanced) yarn, the fabric biases diagonally. The direction depends on the twist direction of the yarn.

S-twist yarn → Left bias

Stockinette fabric spirals counterclockwise

Z-twist yarn → Right bias

Stockinette fabric spirals clockwise

Plying Combinations

Singles	Plying	Result	Notes
S-twist singles	Z-twist ply	Balanced 2-ply	Most common handspun method
Z-twist singles	S-twist ply	Balanced 2-ply	Alternative traditional method
S-twist singles × 2	S-twist re-ply	Cabled yarn	Very strong, round yarn
S-twist singles × 3	Z-twist ply	3-ply yarn	Round, durable yarn for socks
Z-twist singles	Z-twist ply	Energized singles	Textured, springy yarn

Project Recommendations

Spinning Project Type

Twist direction:S-twist singles, Z-twist plying

Ply style:2-ply balanced

The standard method for most handspinning. Spin singles clockwise (S), ply counterclockwise (Z).

How to Use

Review the S-twist and Z-twist comparison cards to understand each direction.
Check the bias section to understand how twist affects stockinette fabric.
Consult the plying table for common singles + plying combinations.
Select your project type for specific twist and plying recommendations.
Use the bias test method to check if your handspun yarn is balanced.

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Yarn Twist Direction Guide