Susan Ritchie and Karen Miller learned to crochet and knit as small children in the yarn and sewing shop that their mother ran. Now with families of their own, the sisters have followed in their mother's footsteps, but in 21st-century style. Their online store, Mrs Moon, sells their yarn lines, including Plump, a bulky yarn; Plump DK (light worsted), its skinnier sister; and Fluff, their furry cousin. They also design unique patterns, teach bespoke classes, and run crochet and knitting meet-ups. Find out more at www.mrsmoon.co.uk. Karen and Susan live in south-west London, UK.