What chicken lays the largest brown eggs?

[Egghead_Jr]

Older hens or hatchery sex links is likely what they have. My Hatchery RIR have always laid jumbo eggs once laying for 3 months but our black sex link even as a pullet laid jumbo.

Those eggs will be the dark brown egg. Any Orpington like Rocks lay a tan egg.

 

[mamatink7]

I know old post, but I know there are still questions like this.
One of our black australorps laid a jumbo, ended up large double yolks. Our Golden comets have laid several jumbo, all being double yolkers. They lay more on the large and some days extra large eggs.
All our girls are pullets. The other layers (buff Orpington) are still smaller-medium on the egg scale but they have only been laying for 2 weeks.