This simple pattern is worked in the Slip Stitch Honeycomb stitch, using two colors. It’s then folded in half and sewn together along the sides to make a two-sided, double-thick holder.

Note: I am no longer at About.com Knitting and they have been removing and rerouting pages. The pattern can still be found on the Internet Archive

http://web.archive.org/web/20150406181308/http://knitting...

but you may want to print it to preserve it for your records.