With chunky yarn or thicker on 6.5mm needles (see below for yarn requirements)
Row 1 (ws) - p1, k1, p1 tbl, k1, *p2, k1, p1 tbl, k1, rep from * to last st, p1.
Row 2 (rs) - k1, p1, k1 tbl, p1, *k1, yfwd, k1, p1, k1 tbl, p1, rep from * to last st, k1.
Row 3 - p1, k1, p1 tbl, k1 * p3, k1, p1 tbl, k1, rep from * to last st, p1.
Row 4 - k1, p1, k1 tbl, p1, *k3, pass 3rd k st over 1st 2, p1, k1 tbl, p1, rep from * to last st, k1.
Cast off purlways.
I've been making them long enough to go around the neck once with a short overlap and buttons to fasten. The idea behind them was that they still keep your neck warm without the bulk or hassle of a long scarf.
I didn't fuss about too much with gauge for this as it was only a scarf, chunky or thicker is required - anything around 10-15 sts/4" will work fine. The green one is in a really thick mystery yarn (somewhere between chunky and big wool), unfortunately I can't be any more specific than that. The red one is in chunky (14 st/4") and took approx. 70 yards, it's 5" wide unblocked and 22" long.
Initially I'd planned on putting the buttons on the underside so they would fasten out of view, but I liked the buttons for mine so much I wanted them to be seen. It would also be a little unwieldy with cold fingers.