The following style is for nonfiction. -------- CMOS said to me in an email reply, "Please see CMOS 6.80; an en dash is used to prevent confusion; it’s a style choice, not a rule that cannot be broken. None of your phrases are enhanced by an en dash. It doesn’t improve comprehension, and the mixture of hyphens and en dashes simply looks like bad typesetting. We do not endorse ungainly modifier strings like the ones in your examples, but if you are forced to use them, just use hyphens: (e.g. $3-$5-million-a-year contract, not a $3–$5-million-a-year contract)." ----- That said, do all of the following examples look correct based on Chicago's guidance above? 25-30-year mortgage 30-40-year-old period 45-50-year-old patients every single 65-70-year-old 1-2-pound weight loss 10-20-mile hike 3-5-gallon container 10-20-liter batch of fresh agave juice 30-40-kilogram loads 20-30-minute conferences $10-$20-million-a-year contract $40,000-$50,000-per-year joint income 20-40%-a-year increase 20-$25-a-month service fees a $10-$15-per-month balance an $85-$90-a-week deduction a $30-$35-million-plus deal 25-30-, 35-40-, and 45-55-year-old men 25-30-, 35-40-, and 45-55-year-olds Please, no suggested recasts. Thank you.