Truchicks, my SS is the smaller one too. I'd say she is half the size of the Barred Rock who was hatched the same day. I don't know if this is just the breed characteristic. Since yours all all different breeds, you can't really compare them to each other as to what's normal in feathers, comb development, etc. Did you buy them as being sexed as pullets?
Billyboy, they say the feathers on neck and tail become pointed at the ends in the cockerels and the pullets' have rounded ends. I can't tell by your photo. I've read every forum on 'what gender' for the past 7 weeks, and followed them to their conclusions when they continued them that far. That's my only experience on the subject!