No. We don’t offer custom-sized mat borders. Our mat borders are available in three standard sizes only: Standard (50mm), Oversized (80mm), and X-Large (120mm). These options apply to both Print and Frame and Custom Frame orders.
Some Gallery Walls include mat borders outside of these sizes, however these are fixed designs and aren’t available for Print and Frame or Custom Frame orders.
Please note that for A0 frames, X-Large mat borders aren’t available, only Standard (50mm) and Oversized (80mm) mat borders can be selected.