Waterborne acrylic latexes can be prepared via batch, seeded, in situ seeded and continuous polymerization. In this investigation, the seeded process was used for the preparation of nano-size seeds with a target average particle size of Dn ≤ 50 nm. These nano-size seeds were then used for the preparation of ultrafine full latexes via a semi-batch process with a target average particle size of Dn ≤ 100 nm. Surfactant concentrations were optimized to ensure minimal grit and coagulum and clean reactions with the final surfactant concentration of 0.45 parts per hundred of monomer (phm) in the final latex. Additionally, these ultrafine dispersions were evaluated for latex film appearance, gloss, adhesion and water pick-up performance. Finally, the dispersions were utilized to prepare semigloss paints to illustrate the effect of particle size on select paint properties (i.e., appearance, gloss, block and adhesion).