Here is some info I found. From "Storey's Illustrated Guide To Poultry Breeds"
cock: 4.5 lb
hen: 3.5 lb
"A small active bird, the Fayoumi hails from Egypt."
"Young hens are not given to broodiness, but the two- and three-year-old hens are. The hens are excellent layers of small, off white eggs, though pink-tinted eggs are not unusual. They are fast to mature: pullets begin to lay at four and a half months, and cockrels start to crow by five to six weeks. They are almost feral-like, being self-sufficient and rugged, foraging for all their own food if given the chance."
I can't wait to have some when my hubby and I find a farm. If you like Fayoumi's, check out Norwegian Jearhons. They are small too (3-3.5 lbs), but the hens lay a large egg.
There is also info at feathersite.com