A toner for developing electrostatic images in a single component development (SCD) system free of carrier and including emulsion aggregation toner particles of a styrene acrylate polymer binder, at least one release agent and at least one colorant, wherein the toner particles have a volume average particle size of from about 5 .mu.m to about 10 .mu.m, an average circularity of about 0.95 to about 0.99, a volume and number geometric standard deviation (GSD.sub.v and n) of from about 1.10 to about 1.30, and an onset glass transition temperature of from about 45.degree. C. to about 65.degree. C., is ideally suited for forming an image using a single component image forming device.