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Nancy's Knitnacks WPI Tool
Brand Nancy's Knitknacks
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This WPI Tool by Nancy's Knitknacks is a handy device for all fiber artists who want to measure their fiber's WPI. Increasingly, WPI is being used by designers and yarn manufacturers when specifying their designs or yarn characteristics. Two yarns that have the same WPI can be exchanged. This is important if you are trying to substitute one yarn for another for a given pattern.
To measure your yarn's WPI, count the number of times your yarn wraps around the tool up to the 1 inch mark. Count the wraps and that is the WPI. Then check the chart on our WPI Knit-Kard (included), and that will tell you what weight your yarn is.
The WPI Tool Kit includes the WPI Tool and our WPI Knit-Kard which includes instructions on using the tool plus reference data for interpreting the WPI measurements.
The WPI Tool is made from birch hardwood with an oil stain finish, measures 5" in length x 5/16" diameter (Yarn Guide knob measures 5/8") and all markings are laser etched into the wood and will not wear off. There are markings for up to 3 inches which allows you to calculate a more accurate average WPI on certain hairy yarns, along with 1/2 inch marks.
A special yarn guide knob is used to hold your yarn in place while measuring the WPI.
You also get Nancy's special WPI Knit-Kard™ with the WIP Tool. The Kard tells the user how to use the tool and provides a useful WPI chart for 6 different weights of yarn.