Seveah's page

It only gives Large and Small because those are the normal PC options that you would see.

D20 has a chart at the bottom of the Enlarge Person Spell. You go down one die from the Small option, so 1d3 unless you gain more levels in Warpriest.

Excellent. I had assumed as much, but I wasn't 100%. Thank you for the answer!

I've been digging and digging and I'm either blind or can't find it.

I'm playing a tiny character that will pick up a level of Warpriest in my build. Does the chart for Sacred Weapon extend beyond small and large, or are you just assumed to use the nearest option?