The size is M, but it's quite large. Perhaps that's the intended design. It's different from what I expected, so I'm putting it up for sale. There is no lining. The length is approximately 116cm from the back button to the hem. There is an opening in the back. The shoulder width is about 17cm from the neckline to the edge. The waist has no seams or anything, and it flares out in an A-line shape from the top. The skirt hem is about 107cm when spread out. It's a smooth, cool dress that looks great for summer. I will fold it up small for shipping. Thank you for your understanding.