A lot of people make hand plane holders by making an inclined shelf on the wall. Personally, I have always made more of a holster-like holder that the plane slides into from the top. That holds the plane very securely, but the plane needs to be able to slide up, which means I can't mount anything directly above it, and if the holder is mounted high, I have to reach higher.
I recently had another idea.
I could have the top of the plane held against the board by a hook. The bottom of the plan can rest just on a shelf. Gravity will want the plane to rotate counterclockwise (from the view in the photo), so that will naturally pull the handle on the bottom towards the wall.
Tracing the outline of the plane for the sides of the plane holder.
With one side cut on the bandsaw, I'm tracing it to get the shape for the other side piece.
The part on the bottom will follow the contours of the sole and handle.
This is how the pieces go together.
Sides and bottom glued on, and adding glue for the hook at the top.
Assembled and screwed to the wall.
The plane is easy to take out and put in.
It's important to not make the hook at the top fit too tightly. Ideally, it would be tapered. Otherwise, when pulling the plane out by the handle, the rotation can cause it to get stuck at the top, potentially breaking the hook.
A magnet instead of a hook is another option, but I prefer to keep this sort of thing all out of wood so I don't have to go shopping for whatever magnet I'd need for what I'm building.