This is a GU one-piece dress. I purchased this dress after it had been used once and washed. However, the length was too long for me, so I only tried it on and stored it. The size is S. Shoulder width: 38cm, Bust: 44cm, Sleeve length: 58cm, Length: 109cm. It has a lining, so it's comfortable to wear. Please note that this is a used item, and there may be wrinkles from storage or shipping.