So far this is a real easy knit. I would suggest that you sew up the heel before deciding how long to make them. I made them bigger thinking they were too small but then realize they were really too big and had to take them apart.
Aug 28/09 - one done already
Needles: Size 13
Yarn: Lion Brand Wool-Ease Thick & Quick in navy 2 skeins
Pattern: http://www.ravelry.com/patterns/library/simple-man-slippers