From the Irish Hiking Scarf Knit Along: Ok, here is the pattern modification for the wrist warmers
EDITED TO ADD:
I used Cascade 220 (Worsted Weight) and size 8 (US) needles.
Note on gauge: I didn't do a swatch so I have no idea what it came out to, but I tend to knit a bit tighter than your average knitter.
PATTERN
Worked flat, then seamed up at the end.
Cast on 40 stitches.
Row 1. (WS) K1, P2, K2, P6, K2, P2, K2, P6, K2, P2, K2, P6, K2, P2, K1
Row 2. (RS) K3, P2, K6, P2, K2, P2, K6, P2, K2, P2, K6, P2, K3
Row 3. (WS) REPEAT ROW 1.
Row 4. (RS) REPEAT ROW 2.
Row 5. (WS) REPEAT ROW 1.
Row 6. (RS) REPEAT ROW 2.
Row 7. (WS) REPEAT ROW 1.
Row 8. (RS) K3, P2, C6F, P2, K2, P2, C6F, P2, K2, P2, C6F, P2, K3
Do 4 Repeats. On the 5th Repeat, work rows 1-5 (finish WS row)
Next row, begin ribbing
Work 8 rows of 1x1 Ribbing
Cast Off
EDITED TO ADD: Since I have gotten a lot a questions about what 'C6F' is, here is a bit of a clarification:
Put the first 3 stitches on the cable needle and let it drop in front of the work. Knit the next 3 on the kntting needle. Finally, knit the 3 you had on the cable needle starting with the stitch on the far right. I will try and take a few photos to clarify and post them when I can.
Begin seaming from the top. Seam the ribbed area, then leave a 1 1/2 inch hole for your thumb. Resume seaming using the mattress stitch to create the illusion of the double rib pattern (See photo).

Hope that makes sense. I am new at writing up patterns :)
Have a Great Night!