The most beautiful dark blue frame, which is 15x15 mm. A nice matt varnish that covers the structure of the wood. Our frames with special measurements get exactly the measurements you define - right down to the millimeter. Please note that the measurements you specify apply to the glass of the frame and thus the poster for which you will use the frame.
For your dark blue picture frame, you can choose acrylic glass (plexiglass) or one of the three different types of real glass: normal glass, non-reflective glass or museum glass, which optimally protects against UV radiation.
Mount is a piece of 2 mm cardboard, which is placed between the glass and the poster without casting a shadow on it. When you choose a cutout in your mount, you should subtract 1 cm from both height and width compared to the dimensions of your poster, so that there is 0.5 cm all around to mount the poster on the back of the mount. If you have, for example, a 30x43 cm poster, you must choose 29x42 as the cutout.