Count resume bullets per section.
Bullets should be distributed by recency and relevance, not evenly. Your current role earns the most — four to eight depending on tenure — because it is what a hiring manager reads first and weighs most heavily. Earlier roles taper to two or three, and roles beyond about ten years old often need only a title and dates. Distributing bullets evenly across five roles is the most common resume structure error: it gives equal weight to a job from a decade ago and the one you hold now, consuming the page budget on the least relevant history.
Recency weighting
Current role bullets = 3 + years in role, held between 4 and 8; earlier roles 2 to 4 each
Page fit
Pages = total bullets x words per bullet / 320 words of bullet content per page
Because relevance decays and page space is finite. A hiring manager scanning for fit reads your current role closely and skims the rest. Detailed bullets about a job from a decade ago consume the space that should be demonstrating what you do now.
Fifteen to twenty words — one line at typical formatting. That fits an action, a scope and an outcome. Bullets wrapping to three lines get skimmed rather than read, and the quantified outcome at the end is exactly what gets lost.