I found this at: http://alison.knitsmiths.us/pattern_beginners_scarves.html
All patterns and images © Alison Hanseland are shared here for individual personal use only.
RIBBED KEYHOLE SCARF
Measurements:approx. 8" wide and 26" long (note: ribbing will usually cinch in making the scarf skinnier)
Instructions:Cast on 38 st. (26 stitches with bulky yarn).
Row 1: Work in 2x2 ribbing across the row, starting with K2 and ending with K2.
Row 2: Continue ribbing by working stitches as they appear, beginning with P2 and ending with P2.
Repeat the last two rows for 22".
Make opening: Work ribbing for first 12 stitches, bind off 14 stitches, continue ribbing over remaining 12 stitches (with bulky yarn, work ribbing for 8 stitches, bind off 10, continue ribbing over remaining 8 stitches).
Next row: Work ribbing for first 12 stitches, cast on 14 new stitches over the gap, join to stitches on other side of the gap and continue ribbing (with bulky yarn, work ribbing for 8 stitches, cast on 10 new stitches over the gap, join to stitches on other side of the gap and continue ribbing).
Continue working in rib across all stitches for 4 more inches.
Bind off stitches in rib (if the stitch is a knit stitch, knit it; if it's a purl stitch, purl it; pull stitches over one other as usual).
Weave in ends.
Wrap around neck, push one end through hole on other end and see how stylish warm can be!