A Christmas tree with a cavity in which wire fairy lights can be placed.

1m of fairy light works perfectly as these only have 10 lights on. The gaps are spaced to ensure that the wire isn't stretched inside of the tree. I secured the lights in place with a hot glue gun.

The dimensions are:

Height -180mm high

Width - 100mm wide

Depth - 61mm (at base) & 11mm (tree)