This design uses a combination of different yarn weights. Because my working yarn was a heavier weight for my swatch sock, I decreased the stitch number to 60 and for a delicate look, used lace weight yarn for the Color Loops. I also changed my needle size from US 0 (2mm) to US 1.5 (2.5mm) (It would work equally well with lace weight for the Color Loops and light fingering for the working yarn over 64 stitches using needle size 0 as usual.) Yarn credits for this sample sock:

Anzula Squishy, Seaside, light gray tonal, 80% Superwash merino, 10% cashmere, 10% nylon, purchased at Green Planet Yarn, San Jose, CA. 2018.

Mad Tosh Prairie gray lace 100% merino wool, purchased at Green Planet Yarn, San Jose, CA. 2018.