My builder uses Houzz Pro to plan the timeline and give detailed estimates and daily updates with photos of progress, and provide invoices at pre-agreed key points in the build. This made the whole experience much more efficient and stress-free.
I'm sorry. It has been a few years since I did this and I just don't remember. Eyeballing it, they are probably around 24 to 30 inches wide by at least 36 inches tall. They are just the depth of a regular drywall interior and protrude about an inch, so maybe 4 inches deep or so.
Pangaea Interior Design, Portland, OR