I have 24 Bravos on my boat. What size Mirage Plus would be equal. 23" ?

Usually when you add a blade, you go down 2 pitches. You are removing a blade, so I would think you need to go up 2 pitches. Nevertheless, your image shows you have a Cigarette. I don't think you want to go with a 3 blade. BBlades has a trial program.

Urban has a good point there. A thing about the Bravo is, that the true pitch is more like 23". So with one less blade and the smaller dia. of the Mirage, a 25" should hit the same rpm's+/- a bit. What is your goal?

I am happy with the 4 blade props, I am just shopping for a set of spare props . I don't want to lose a weekend of boating if I have a prop problem.

on my baja 272 496 HO
bravo1 24p=4800 max
mirage+23=5050 max
on smartcraft digital rpm