How to Know What Weight Your Yarn Is Using Wraps Per Inch

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Wondering what weight that mystery ball of yarn is that's been in your stash for years? Or maybe the label for a yarn you just bought doesn't tell you if it's a sport or DK or worsted? How can you know what weight a yarn is without a label or a person telling you?

This is a very common question, and luckily there's an easy answer!

 

The quickest way to figure out what weight a yarn is is by measuring the wraps per inch. Do this by wrapping the yarn very evenly around a ruler or needle gauge, like the photos below. For best results, wrap the yarn two different times, once a little on the loose side, and once on the tight side, making sure both times that there isn't any space in between the wraps. 

 

 

After wrapping each time, count how many wraps fit within one inch find the average between those two numbers. In the two examples above, one measured at 7 wraps per inch, the other at 9 wraps per inch. 

 

Then, use the chart below to determine what weight the yarn is. Based on our example, it looks like our yarn is a bulky weight yarn!

 

Lace 25+ wraps per inch
Sock / Fingering 18–22 wraps per inch
Sport 15–20 wraps per inch
DK 13–17 wraps per inch
Worsted 11–15 wraps per inch
Aran 9–12 wraps per inch
Bulky 7–9 wraps per inch
Super Bulky 4–6 wraps per inch
Jumbo 1-3 wraps

 

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