This is an order-made shirt from Azabu Tailor. Purchased around 2016. Measurements (approximate): Width: 48cm Neck: 14cm Length: 64cm Sleeve Length: 56cm Armhole: 22cm I am 160cm tall, with a bust size of D75-E80. It's a relaxed fit, so it's also suitable for wearing casually over a T-shirt. There is a hidden button between the third and fourth buttons.