All of my work is 'A' sized. The majority of the originals are A2 with some A3. The best frames are those that are made to fit A4 prints, as opposed to those that work for traditional photograph sizes such as 8" x 12".

IKEA do a number of frames such as the RIBBA which includes a mount. Click here for more info. If you prefer a frame without a mount, IKEA's FISKBO will also work, click here.

There are also lots more options online.