Hen nesting box sizing

[turksinmaine]

My bourbon red and bronze standard hens need nesting boxes built for them straight away. What dimensions should I design them?can you create stackable like you can with chickens?

 

[R2elk]

My bourbon red and bronze standard hens need nesting boxes built for them straight away. What dimensions should I design them?can you create stackable like you can with chickens?

The nesting areas my hens prefer above all else is a pallet leaned up against a wall and they build their own nest between the wall and the pallet.

 

[turksinmaine]

That just not a option for me. I have too many hens not enough room.