You have a pattern that calls for a DK weight, or Worsted weight, Lace weight, Sport weight or Super Fine, what is that size in relation to the Craft Yarn Council markings that are on commercially made yarns. These posted sizes (thicknesses) are using the Craft Yarn Council standard numbers 0, 1, 2
Custom Yarn Frequently Asked Questions
Shop — Ohio Yarn
Understanding Yarn Weight
Shop — Ohio Yarn
Yarn Weight Chart and Guide - Sarah Maker
Determining Yarn Weights with Wraps Per Inch
Shop — Ohio Yarn
A Beginner's Guide To Yarn Weights Michigan Fine Yarns, 51% OFF
How to Understand Yarn Weights
O-Wool - Balance - Yarn Loop
Yarn Weight? Your questions answered — Ohio Yarn
All you need to know about yarn weights - ChristalLK