What is the exact size of the Titanium Dioxide particles in the powder foundation? January 21, 2019 17:28 Please refer to the attached document which shows the size in more detail. Related articles Are both grades anatas and rutil structures of Titanium Dioxide safe for use in cosmetics? What testing do your ingredients go through (specifically titanium dioxide, iron oxides, zinc oxides, and mica)? Do you use any nano or micronized particles? Where is your Mica sourced Do your products contain nickel or metals?