ELF Studio Small Stipple Brush $3
Check out this foundation brush master class. It has great tips that you can use.
best foundation brush - Real Techniques stippling brush
Makeup Geek Brush - Foundation Stippling Brush - MB03 - Makeup Geek
Pinterest: Jocy ♡ Deason - real techniques foundation brush overview - stippling, buffing & expert face brush tips
Stipple Brush Travel Set | e.l.f. Cosmetics
How to stipple foundation for an air brushed look
Roni Johnson: Ink Stains. Stipple Brush & Masks
Clean Stippling Brush
"Airbrushing" with a stipple brush - I had forgotten about this technique.