Here's the set I made him. They fit quite well in a D-cup bra:
The only problems he had was that the stuffing is a bit fluffy until they pack down a bit, and I had to put some weight in them. Each has about a dozen glass marbles tied into a piece of nylons buried in the fiberfill. Also, I was a beginning knitter when I made them, so I wasn't all that great at knitting in the round yet. I'll probably make a new set eventually now that I've improved. Also, I'd make them out of a nice, soft yarn (Simply Soft or something similar) since they are going to rub against the person wearing them's chest. The pattern itself recommends them for mastectomy patients, and says that you can sew them so the bottom part indents in to protect the scars if necessary.
Anyway, just thought I'd post this in case anyone had a use for it
*edit* grrr...I hate flickr links