Answer: hatsize

AnswerCrossword Clue
HATSIZE6 7-8, e.g.
HATSIZE7 1-8, for example
HATSIZEMilliner's concern
HATSIZEImportant measurement.
HATSIZE6 7-8, for instance.
HATSIZEBowler's number
HATSIZE7 1-8, e.g.
HATSIZEBowler number
HATSIZE7 1-4 is a common one