My Buffs will be one year old next month and they lay small pinkish colored eggs. About half the size of my Black Sex Links eggs which are very large and dark brown. I thought initially they would get bigger and I think they did for awhile but it seems lately that they may be getting smaller. The BSL's eggs are so large they won't fit in egg carton, carton can't close, the Orp's eggs are so small they rattle around in the slot.
I'm glad to hear that Orps eggs are supposed to be large because I wanted to get some more Orps but didn't like the tiny eggs.