Hi Annie, I would start with
I would start with the firing schedule tutorial on this site (under Learn / Technical Tutorials).
The short answer to your question is that small pieces can be fired faster than large pieces because there is much lower risk of breaking (both up and down), and they require less annealing time. The process temperature – where the glass is contour fused or full fused (or something else) doesn’t change for small glass.
We contour fuse at 1415F with a 4 minute hold.
Helios Kiln Glass Studio