The tag says "S" (photo 7, 8). I bought this a while ago, and I rarely buy clothes from GU, so I'm not sure if this is the size tag. Total length (straight line distance from the top of the straps to the hem, with the straps extended): Shoulder straps: Max 62cm, Min 53cm *Measurement method is based on Takashimaya Fashion Square. I measured it using a different method (photos 4, 5, 6). Can you tell the size from this? Feel free to ask any questions in the comments.