The pattern is knitted on one set of single pointed needles - size 6 US or 4mm with worsted weight yarn. No extra needles or techniques are required to make a very comfy pair of slippers. And better still, you can make slippers to fit a foot up to an adult men's size 14. Yup! That big. And as small as a woman's size 6; all North American sizing.
The purchase of this pattern allows you to make and sell the slippers, but you may not redistribute or resell this pattern in any form.