What age do Jumbo Coturnix quails reach maximum size and weight?

[bridgetchicken]

What age do Jumbo Coturnix quails reach maximum size and weight?

 

[Nabiki]

About 12 weeks. If you're raising them for meat, though, it's usually considered butcher time at 8 weeks. They're almost full size by then, and the amount they eat is worth more than the small amount of remaining growth they have left.