This is a 1960s flannel shirt from Five Brother. It originally had a "Mori" tag. The details confirm its authenticity. Other sellers on Mercari are selling similar items with the same details and tags, so there's no doubt about it. Measurements: Shoulder width: Approximately 46.5cm Body width: Approximately 56cm Length (from the back of the collar): Approximately 72cm No claims and no returns, please.