I've always had the biggest iPhones and am coming from the 11 Pro Max, but found the 12 Pro Max just too big. Realizing the actual dimensions and weight are close to the 11 Pro Max, not sure how to explain, but it just seemed much bigger and heavier to me. My decision was made this weekend at a restaurant when I found myself thinking too much about where to place it on the relatively crowded dining table. Had a similar experience thinking about where best to place on my bathroom counter. I never had these thoughts with my 11 Pro Max.
Anyway, returned it last night and picked up the 12 Pro.