I always liked Guy Kawasaki’s rule he calls 10/20/30. 10 slides, 20 minutes, 30 point font. It’s a very good rule. In reality you can have 12-15 slides (and other 10 in an appendix that you only refer to if asked a “deep dive” question”. In reality you can plan for 40 minutes (but be ready for what you would do if you only had 20. VC’s are notoriously 20 minutes late to meetings and if they’re respectful they’ll give you a full 40 minutes to pitch – but not always). I’m not a stickler for the 30 point font but I would say … be as visual as possible, don’t use many words, don’t use the slides as your “crib notes” and don’t put up slides and then say, “I know this slide is a bit too detailed or hard to read.” The cliched messages apply: 1) less is more and 2) a picture is worth a thousand words.