The A2 size print measures 42.0 x 59.4cm, 16.53 x 23.39 inches, if mounted 59.4 x 76.6cm, 23.39 x 30.16 inches. http://www.stephenwiltshire.co.uk/paper_sizes.aspx
Prices for A2 prints -
John E Wrights:
Nottingham Trent Uni also offer printing at the size of A2 at a cost of £5.00 a print but I would have to mount them myself.
I chose to go with Hayman Graphics they are more expensive than the other printing places, but these offer quality and take the customer into consideration.