Stone Wool Cormo


When Whitney began making handspun yarn under the Stone Wool moniker, 2-ply worsteds were her bread and butter. Versatile and fun to knit with, this spin resulted in the perfect workhorse yarn.

Never was this truer than when spinning with Cormo wool, which provided the perfect mix of soft hand and hardy wearing. The fiber possessed unusual boing and spring and its long staple length made it a joy to spin.


When Whitney joined with Twig & Horn to develop a mill-spun yarn, a 2-ply worsted seemed the perfect homage to Stone Wool’s handspun origins. We partnered with two ranches—one in Montana one in Wyoming—for Cormo wool, and a Western mill for fiber processing and spinning.

We worked with the mill on a special method of fiber preparation, one that marries woolen and worsted processes. The result is a unique yarn with woolen spun’s airy loft and worsted’s strength. Springy, lofty, and with a substantial hand, Stone Wool Cormo offers crisp stitch definition, with the perfect amount of textured in the knitting. We hope you fall in love.


The yarn has a wonderfully nubby texture, which blooms in the soak. Our Cormo can be knit in a wide range of gauges for a completely different fabric. We recommend needles size US 6 - 7 for hard-wearing knits, up to US 9 - 10 for knits with full drape. 

The wool is gently scoured, never with harsh chemicals, and as a result there will be occasional flecks of hay and nips in the fiber, which are easy to pick out as knitting, if desired. All skeins are 100 grams and approximately 200 yards. Gauge: 5 st. / inch on US 6 s ; 4.25 st. / inch on US 8 s.