Counting what you can actually serve
The number is not the biggest room your platform allows; it is the smallest of three honest measurements. First, the meeting space you bring โ the practical size at which everyone can be seen, heard, and not drowning in the noise of a crowd. Second, the attention you planned: a session of slides read aloud can stretch further than one where you intend to answer every registrant's follow-up note personally.
Third, the things that multiply per head. A workbook you prepare, a certificate you sign and issue yourself, a resource you assemble for each attendee โ these are counted in hours, and hours have a harder ceiling than any software. Take the smallest of the three measurements, and that is the number worth setting. The cap you can configure follows your plan; the tiers are laid out on the pricing page rather than quoted here.