"Why do you need so many people on this project?"
Hopefully, this will answer your client's question once and for all!
About Mike Bell:
Mike Bell is a Sussex-based designer who produces Tube / Underground maps of places, ideas, stories, and facts.
Mike's posters are supplied from the UK in a range of standard sizes on sustainably sourced and FSC-certified stock.
These underground lines posters are supplied in a range of A-sizes:-
A3 Poster (29.7 x 42.0 cm / 11.7 x 16.5")
A2 Poster (42.0 x 59.4 cm / 16.5 x 23.4")
A1 Poster (59.5 x 84.1 cm / 23.4 x 33.1")