SlimceaHi @Slimcea, great question. The tip sizes vary, as listed below:
207 Gel = 0.7 mm
Jestream = 1.0 mm
Vision Elite micro = 0.5 mm
Vision Elite bold = 0.8 mm
SlimceaIt looks like they are either 0.7 or 1.0mm... At least the JetStream RT look to be 1.0mm and the 207 are normally 0.7. The Vision Elites could be different sizes.
207 Gel = 0.7 mm Jestream = 1.0 mm Vision Elite micro = 0.5 mm Vision Elite bold = 0.8 mm