Wraps Per inch method
It consists of classifying the wool according to the number of turns that fit in an inch (2.5cm)
In a ruler we are going to roll the wool around starting at 0 until we reach 2.5 and then we go to the table below and we can see what thickness it corresponds to.
![](https://jumpseller.s3.eu-west-1.amazonaws.com/store/madejasur/assets/2_Metodo_WPI__2_.png)
![](https://jumpseller.s3.eu-west-1.amazonaws.com/store/madejasur/assets/2_Metodo_WPI__3_.png)