Question AR App to measure volumes of 3D objects in Unity

Hello Everyone,

I'm trying to develop an AR application that is able to capture objects and then measure their volume. First I was planning to create it for Cube-shaped objects such as boxes, mobile phones. What I planned to do after research was to create a bound box once the object is captured by the camera. I was looking all over for tutorials, forums to find a good headstart for the project, but could not find any. Does anybody can help me to get an idea of how to do this or provide me a reference to follow up, that would be really helpful. I'm very new to AR development but not to Unity.

Appreciate any suggestion. Thanks