I love Craftsy. It was such an invaluable resource to me when I first started quilting in 2012. But did you know that in addition to all of the amazing classes, patterns, and fabric that they also have some handy reference materials? Below is their metric conversion chart. When I saw this, I immediately thought of all my international quilty friends, especially those with metric rulers who struggle to convert patterns You can download the PDF directly from their website here.
For some reason, I had a hard time trying to find the comprehensive reference list on their site. They don't seem to have an easy-to-find link, so I just added the word references at the end of the URL and got to it that way. Here is the direct link for all Craftsy reference materials. You'll notice that they have reference categories for both quilting and sewing.
*This isn't a paid endorsement or anything fancy like that. I just like Craftsy and wanted to share something new that I'd found.