I needed the U.S. sizes for conversion when acquiring new hooks that are in mm measurement.
The multiple sizes allow me to have one in my sewing area or with my hooks.
I can also carry one in my wallet.
I loved the clever girl who put it on her phone. I plan to do the same.
A very handy reference chart for hook sizes. I love it!
Printed our the Reference hook chart is very handy.
The crochet hooks reference chart in different sizes is a handy reference tool. Plus, I have it on my cell phone for added reference when I'm away from home and find bargain yarn and patterns.