What are the sizes of crochet thread? Check out our size guide. | Lyns Crafts
Thread Size Chart – Grand Brass Lamp Parts, LLC.
Needle and Thread Chart - Primitive Quilts and Projects
Guide to Thread Size - Handy Hands
I'm using the thread tool. Blue thread is outer diameter. I made the orange ring's inner diameter the same as the blue's outer diameter, then some wall thickness. Same numbers for the
How to Measure Thread Size (Sewing Thread Guide) | AllFreeSewing.com