We have taken into consideration that you may not want to go to the expense of having your prints professionally framed (although they do look great when they are!) so have kept to standard sizes, these all include an approximate 5mm white border -

A4 Prints - (paper size) 21cm x 29.7cm will fit 'off the shelf' A4 frames

A3 Prints - (paper size) 29.7cm x 42cm will fit 'off the shelf' A3 frames, but check frame measurement first

A2 Prints - (paper size) 42cm x 59.4cm will fit 'off the shelf' A2 frames

Digital Mini Prints - (card size) 127mm x 177mm (5" x 7") will fit off the shelf frames if required