Size and Canvas

 A4 onto Artboard
 A4 onto Box Canvas [+£20.00]
 A3 onto Artboard [+£100.00]
 A3 onto Box Canvas [+£125.00]
 A2 onto Artboard [+£200.00]
 A2 onto Box Canvas [+£230.00]
 A1 onto Box Canvas [+£340.00]