How Do You Define Small, Mid, Large, and Enterprise Projects in Terms of Hours?

Hello everyone,

I'm exploring different ways to categorize projects based on the overall hours required to complete them, and I’d love to hear how others define these categories. Currently, here’s a basic framework I’m working with:

I’m interested in learning how others categorize their projects based on hours. Specifically, I’d like to know:

1. How do you define each project's overall category in terms of hours?