Hand dyed, crisp linen with the drape of silk. Softens with wear and lasts for ages. 65% Silk, 35% Linen 250m / 100g; 273yds / 3.5oz Impact: Hand ...View full details
DK stands for Double Knit. I'm honestly not sure the origins of that, but it is thicker than sport and not as thick as worsted weight.
Gauge is typically 5 - 5.5 stitches per inch.
Many DK weight yarns can be used for patterns that call for worsted (Alma, Nightshades, Daylights, Wool+Cotton). Other DK weight yarns work for patterns that call for sportweight (Sami, Manos Silk Blend).