A cable organizer based on hexagonal tubes.

With OpenScad Customizer, you are in full control of the cell size, wall thickness, model height, and maximum width and depth. In the preview mode, there is a blue cube that has the same "horizontal sizes" as the "cell size" that you define. There is also a small red platform that depicts that width/depth bounding box.

There are some very useful extra features

Scaling Strategy allows you to automatically scale up the model until it hits the bounding box. If you choose to consider both dimensions, the model will be scaled up until the first bounding box side is reached (so you will not lose any cells).

Special Features allow you to seal off some sides of the model. You can close the side wall and thus create extra half-hexagonal holes. You can also close the bottom of the model

Also available on Thingiverse