I love Ravelry, but not their yarn weight determination system. Though as I write this, I think it may be very handy when a yarn weight is unknown. Ravelry’s yarn weight system is based on WPI (wraps per inch). Now that I have learned how this correlates to yarn weight I have a better understanding and will definitely use this when the yarn weight is not clearly identified on the label or that information is missing.
The tool I use most often is the Craft Yarn Council‘s chart, but I can already see how it is not useful in helping determining the weight of a yarn; unlike the WPI method, one must know or have an idea of what yarn weight one is using.
How do you like that? In the matter of minutes, I have finally cleared up this issue for me.
I knew there was something I was missing. WHAT IS THE DIAMETER OF THE TOOL USED IN MEASURING WPI? There must be a standard. I have seen images of wrapping around a pencil, a tool (standardized), but in reality the diameter of the measuring instrument makes a difference in the wrap count. I should look into a WPI tool.