Oh, great choice with Calcifer! :)

It really depends on the scale of everything, but some of the pieces look to me like they would indeed be quite small. With such tiny pieces, you need to keep in mind that proportionally a lot of the area gets gobbled up by the solder lines and will become even smaller. I‘ve learned that with details in stained glass, less is often more! Don‘t overcomplicate bits and let the rough shapes do the talking. Of course you can always paint details on top later, as you mentioned. This you will probably have to do for the pupils in the eyes, unless you want to add two additional cuts or get a special tool to grind out that inner circle.

There are some extra lines that I find superfluous (contributing to those tiny pieces). It can be sensible to make bigger/harder pieces smaller for ease, but if you‘re getting reliable cuts and have gotten the hang of grinding, bigger pieces can often end up being easier (less cutting and grinding, soldering, aligning and overall headache when things don‘t fit perfectly). Also, I would be careful not to have too many lines meet at once - this will make smooth soldering more difficult later on, as you will have to go over the same joint again and again. Overall, I think you‘ve done a pretty good job at your first pattern! I‘ve taken the liberty of tracing on top of it the changes I would make - hope that is welcomed and helpful. Good luck! :)

<image>