Could be both. Most chickens start with small eggs, some stay that way for quite a long time slowly getting bigger. Others start laying bigger fairly quickly. ASSUMING I've not missed Aurora's (Austra White) initial eggs since the first I knew about was in the alpacas' wall feeder, her first 2 were 54g and the one she laid today was 60g, well in the center of USDA Large. On the other hand Sophia (Columbian Wyandotte) has been laying for a couple of weeks and they are still 44 grams.