Square cross-section needles

Recently, I purchased some square cross-section needles and I love them. There are two brands available (that I know of): Kollage Square® and Knitter’s Pride Cubics. I got mine from the ever delightful Simply Socks Yarn Co. These are lovely to work with: they are comfortable to hold, they really do seem to keep my tension more even and they don’t roll off my working surface when I put them down!  I will report more on these as I play work with them over the coming weeks and months.

There is one major disadvantage as I see it though. That is sizing. Because the square cross-section needles are measured in the same needle gauges as round needles, the size on the needles refers to the the diagonal of the cross-section. That means that the perimeter of a square with a diagonal measurement of, for example 4mm, is smaller that a perimeter (or circumference) of a circle with a diameter of 4mm. As a result, a square cross-section needle marked 4mm is actually equivalent to a circle cross-section needle that is just over 3.5 mm.

The important thing is that a 4mm square cross-setion needle is actually smaller than 4mm circle cross-section needle (your traditional needles).

Below, I have created a chart with different size square cross-section needles (not all these sizes are actually available at this time) and their approximate equivalents in circle cross-section needles and the corresponding US size needles. So, if you usually use a 3mm traditional circle cross-section needle, choose a 3.25 mm square cross-section needle. If you have a 5mm square cross-section needle, it will be approximately equal to a 4.5mm round cross-section needle. The second column just shows what the approximate perimeter of the square cross-section needle.

Size of sq needle (mm) Approx. perimeter (mm) Approx. round size (mm) Approx. equivalent US size

2

1.8

1.75

00

2.25

2.03

2

0

2.5

2.25

2.25

1

2.75

2.48

2.50

1.5

3

2.7

2.75

2

3.25

2.93

3

2.5

3.5

3.15

3.25

3

3.75

3.38

3.25 – 3.50

4

4

3.6

3.50

5

4.25

3.83

3.75 – 4

6

4.5

4.05

4

6

4.75

4.28

4.25

n/a

5

4.5

4.5

7

5.25

4.73

4.75

n/a

5.5

4.95

5

8

5.75

5.18

5.25

n/a

6

5.4

5.5

9

6.5

5.85

5.75 – 6

10

7

6.3

6

10.5

8

7.2

7

10.75

9

8.1

8

11

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