Additional gauges:

Black and white laceweight version (double-wrap)
27 sts/70 rounds = 4 inches in pattern stitch

Blue and grey fingering-weight version (double-wrap) 
22 sts/52 rounds = 4 inches in pattern stitch

Adjusting for other yarn weights:

Numbers are given for three versions, but you can modify very easily by casting on a multiple of three stitches, and working until the piece is the length you wish.

Needles size - Always use needles one to two sizes bigger than recommended for the yarn.