Wraps per Inch Tool by Brown Sheep

Using a classic method of establishing yarn weight, you can easily identify ‘mystery yarns’ in your stash without the stress of hunting down original labels.

Simply wrap your yarn around the middle of the tool and you will know how many wraps per inch (WPI) you have! 

The wraps per inch (wpi) gives handspinners an idea of the finished-weight category of our handspun yarn. A wpi tool can tell us whether we’ve spun a fine lace yarn or a super bulky yarn, which helps us describe our yarn to other spinners or in a note to ourselves for future reference

Tips for Measuring Success

• Use a wpi tool to measure finished yarn. Yarn blooms when it has been finished, plumping up the diameter.
• Having a consistently spun yarn will yield the best measurements. Highly textured yarns and art yarns can make it hard to get an exact measurement.
• Wrap your yarn evenly, but not too tight. Too much tension on the yarn will skew the measurement.