I would keep it for myself. I would ask him. Maybe go to the yarn store and have him pick out what color he wants. One that I always like for guys is reversible. I can't tell you how many stitches to cast on because it's an individual thing. Some people like wide scarves and some like skinny ones. This is cast on in a multiple of 3 stitches. What this means is that you would cast on with something like 15, 18, 21 stitches. However wide you want it. You can maybe do this in a worsted weight #4 or a bulky weight #5 or 6. Look at the number on the yarn wrapper. It's a simple pattern. The first row is knit 3, purl 3 across. The second (wrong) side row is k1, p1 across. Repeat these two rows for pattern. This gives you what looks like a rib stitch but it lies flat and doesn't stretch. I believe the name of this is a Twin Rib. It looks the same on both sides. Most scarves are 6 feet long, but you can make it longer if you want. You can add fringe to it or not. Ask James what he wants.