A3 Magnetic Blackboard
This handsome powder coated steel board from the UK-based Domesticity works just as well with magnets as with chalk.
The board ships complete with mounting hardware, 3 magnets, 1 pack of chalk and sponge eraser.
The eraser slots neatly behind the board to provide a chalk rest.
Dimensions: 11.69" w x 16.53" h. Once mounted it sits about 0.25" out from the wall.