They are not very big birds- not much bigger than a bantam and mostly legs- so their eggs are on the small side, but big compared to how big you would expect them to be from looking at their size...The ones I get would probably be graded "small".
I got them straight run, but somehow did not get any boys...but one of my broodies just hatched out a Fayoumi/Icelandic cross today, so maybe it will be a boy. I have a Fayoumi/American Game Bantam cross pullet, too. I love Fayoumis because they remind me of Sebrights but less crazy.
They are very good foragers that are very flighty. You rarely see them, which is a good thing for some people. When I can get mine to lay in the nests I find they are good layers from a young age, like four months old.