What size airless spray tips do you need for your airless sprayer? Depending on the material you are applying, you will need different sized airless sprayer tips. Airless Paint Sprayer Nozzle Guides Small airless spray nozzle Anywhere from 0.009 in. to 0.013 in. For low viscosity materials such as stains Medium airless spray nozzle Anywhere from 0.015 in. to 0.19 in. For medium-viscosity materials such as latex, oil-based primers Large airless spray nozzle 0.021in to 0.31 (or larger)  For industrial coatings such as epoxy resins, fireproof coatings