Intarsia vs Fair Isle: Which Colourwork to Knit?

Two ways to knit pictures

Both techniques knit a picture from a chart where each square is one stitch. The difference is what happens to the colour you are not using.

Fair Isle: two colours, stranded behind

In Fair Isle (stranded colourwork) you usually work with two colours per row and carry the unused one loosely across the back as a “float”. It’s perfect for small, repeating motifs — snowflakes, stars, borders — and makes a warm, double-thick fabric.

Keep floats short, around five to seven stitches, or catch them as you go; long floats snag fingers and pucker the fabric.

Intarsia: a bobbin for every block

In intarsia each area of colour has its own bobbin or butterfly of yarn, and you twist the yarns where two colours meet. Nothing is carried, so you can use as many colours as you like and make big pictures — a dog, a flower, a sunset.

The trade-off is managing bobbins: rows with many separate colour blocks get tangly, so simpler designs are more fun to knit.

Which should I choose?

Picture of a pet or a place with big shapes: intarsia. Small repeating two-colour pattern: Fair Isle. SoraStitch checks both — it counts bobbins per row for intarsia and measures the longest float for Fair Isle — so you can see which suits your design before you cast on.