Is a Passport TN enough room for sketch notes with labels?

[pencilshavings]

I often add small pencil diagrams and labels beside my notes, and I'm weighing up whether a Passport TN insert would keep that kind of note-taking portable or feel cramped once I add arrows and a few words. For those who use one for sketch notes, do you keep the drawings very simple, or does the Regular size give you space you actually need?