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approximate age; apparent age
marriageable age (esp. of a woman); age of maturity; age of adulthood
age (when ...)
彼女は結婚を考える年頃になった。
She has reached the age to think about marriage.
年頃の娘を持つ親は交際や将来について心配が尽きない。
Parents with daughters of marriageable age have many worries.
彼はまだ高校生だが年頃の割に考え方が落ち着いている。
He is calm for his age.