Frame Company Barton White Grain A3 with Black Double Mount for A4 Fits (11.75x8.25) in mount; (16.5x11.75) without mount. Overall approx 47.91x35.85 cm.
Amazon
Double mount - Black acid-free mount board. The mount overlaps the picture by approximately 2.5 mm on each edge, so the opening is approximately 5 mm smaller in both width and height than the stated picture size.
Double mount - Black acid-free mount board. The mount overlaps the picture by approximately 2.5 mm on each edge, so the opening is approximately 5 mm smaller in both width and height than the stated picture size.