Here is one method of making follower boards for a Langstroth hive (also known as dummy boards). I made these for a deep brood box, but you can make them for any size box using the same method.
1. Start by measuring your frames from top to bottom and from side bar to side bar. Measure from the outside of each piece of wood to the outside of the opposite piece, but exclude the ears on the the top bar.
2. Select a regular top bar and cut it in half lengthwise.
3. Cut two pieces of masonite or other thin material according to the measurements of your frame. Also cut 4 small pieces of wood from scrap. (I show eight pieces in the photo but you only need four for a pair of follower boards.) The wood I used was the wedge from a wedged top bar. My pieces measure 3/16″ x 1/2″ x 4″ (0.5 cm x 1.25 cm x 4 cm). The length and width are not important but the thickness provides part of your bee space.
4. Center the masonite along the cut side of the top bars, lining up the top edges.
5. Fasten the masonite with a brad gun or stapler.
6. Fasten the spacers to the side of the masonite without the top bar.
7. The follower boards are now complete. Here is a view of the complete board on the top bar side.
8. Here is a view of the complete board on the spacer side.
9. Here is the completed deep brood box with nine frames and two follower boards. The spacing works best if the top bar side goes against the walls of the box. The spacer side lines up with the adjacent frame.