Apart from their size there are a few other notable differences between Seramas and other ‘normal’ sized chickens; for example the incubation period of the eggs is a couple of days less (at around 19) and when hatched there can be a randomness in colours and size that you would not expect from other breeds – even within a clutch from the same parents. It takes approximately 5 Serama eggs to equal the volume of one Grade ‘A’ Large egg.