Engraved acrylic board in the standard "medium" size 280x190mm. Fields for title, Dir/Dop and date has the hight to match 24mm label printer tape (Dymo/Brother etc.) or regular 25mm camera tape.
The design features large spaces for scene, slate, take and roll and also has a large box for any additional information that might be needed to write on the board.
Do not forget to add some All Weather Sticks to make your clapperboard complete.