Question ARFoundation Scale Not Matching Real World Dimensions

I have a desk that is about 72 cm tall.


I created a cube in Blender of size 72 cm x 72 cm x 72 cm and exported it as a .obj model:



I placed the cube (with a scale factor of 1) next to the desk. The cube is a little shorter than the height it is supposed to be. You can check the cube's size in this video:

This is the source code I have: https://github.com/nithishakumar/CubeAR/tree/main/Cube/Assets

I use a modified version of the PlaceOnPlane.cs script (to prevent UI raycasting) to place the cube.

Please check the "UI & AR scripts" folder for the modified PlaceOnPlane.cs script and the "Cube" folder for any other important info.

I'm unsure of why the cube is not tall enough. Any help would be appreciated!