Quail eggs are not graded by size because they do not vary as much as chickens. Some breeds of commercial quail are capable of laying eggs about the size of a 50 pence piece however most quail lay an egg between a 2p size and a 50p size.
Chinese painted quail eggs are about the size of a 1p piece or smaller.
Danese, 12 February 2022
Can you hatch quail under a broody chicken hen I always have several good brooding moms Will quail view the chickens as their flock