All of our frames are 20mm wide except our A0 which is 25mm. When selecting a size, this is referring to the print size, all of our frames are an additional 20mm for our slim frame or 25mm for our A0 frames. Please see below print sizes:
A
A0 - 841mm x 1188mm
A1 - 594mm x 841mm
A2 - 420mm x 594mm
A3 - 297mm x 420mm
A4 - 210mm x 297mm