Inside coop is about 10 x 15 with a total of 8 nesting boxes my partner modeled this after Carolina Coops. The run is around 25 x 10 with the run going underneath the coop as well giving it an additional 10 foot maybe?
If the nesting boxes are inside the coop, you could remove half of them to make a bit of additional interior room.
Is re-homing some of your birds an option?