This crochet size and weight infographic details all the different yarn weights and the specifics of each. It breaks down the yarn type, weight, wraps per inch and ply. This infographic also includes a chart of different crochet hook sizes.
crochets symbols 4 languages - US, UK, Danish, German
I'll call this one "Tangle" because it's about the only name it could be.
Ravelry: Victorian lattice square - SVENSKA pattern by Erica Johansson