I received this as a birthday gift and tried it on, but it didn't fit, so I'm selling it. I removed the tag, but it's only been tried on. There wasn't a size 38 option, so I'm listing it as M for now. The size is 38. Generally, it's said to be around an M in Japanese sizing, but it varies by brand, so please refer to the details below. Width from seam to seam: approximately 44 cm When worn by a mannequin, from the center back of the neck to the hem: approximately 85 cm From the center back of the neckline to the hem: approximately 79 cm I'm not sure if it's a tunic or a dress. It probably depends on the wearer's height. The fabric is soft, so there will inevitably be some variation. Please only purchase if you understand this. Those who are on the heavier side and prefer a looser fit should refrain from purchasing. It's perfect for this time of year. Please check carefully before purchasing.