You could also use a q - tip, but I find a small makeup brush is more precise. (playdatesandpearls.com)
Tip: After applying liquid foundation and concealer, use a small makeup brush to apply a light dusting of translucent powder or face powder to the under eye area. (kindlyunspoken.com)
We'd recommend using a small makeup brush for this eyeshadow application. (100percentpure.com)