How to make a box collider fit into a custom model?

I just recently made a model in Blender (Still have a problem there, have to export at a scale of 40). The model is terrible looking coffee cup, and when I insert a box collider, it is a big box. Is there a way to make it so the Box Collider fits exactly with the model? If so, please tell me how in detail, new to Unity + GameDev + Coding… Thanks in advance!

You can adjust collider size manually from BoxCollider’s inspector. If you want to automate this, you can use Renderer.bounds to adjust your Collider.bounds.