I followed directions for size 40 because my gauge was tighter.

Others mentioned that the sleeves were a little tight, so I watched for that and increased accordingly:
2 st in last row of lace at wrist
2 st in 4th row after lace
2 st every 6th row until a total of 66 sts.

2/20/12
I added a 3-row crocheted neck edging b/c the neck was a little too wide, even with the crab stitch.
1st row: sc
2nd row: sc, ch 1, sk1 st repeat around
3rd row: sl st