When you say 'taller' I assume you mean from the open end of the clutch to the end of the pinion dimension.
Going by the pictures in the link the losi is tallest then the ofna then the kyosho. So they are all different. I'm not sure there would a standard size as manufacturers like to make there own size obviously.
I would check the cb's you have and try to guess how far out the pinion sticks out from the bell and try to gage that back to the pictures using your losi cb to help get your eye in.
You'll note the losi and ofna cb's have a gap between the pinion and bell and the kyosho doesn't.
Hope that helps but if it doesn't just curse me for being a brushless guy
