I think this can be worn to weddings, after-parties, and other formal events. The neckline and sleeves are made of tulle. It's a size 36, but it might fit someone who usually wears a size M. Please refer to the actual measurements. Material: Outer fabric: Polyester 97%, Polyurethane 3% Lining: Polyester 100% Separate fabric: Polyester 100% Measurements: Length: 97cm, Shoulder width: 40cm, Bust: 45cm, Sleeve length: 33cm Please note that these are approximate measurements, and there may be slight variations. I'm not sure how many times it's been worn, but I believe it's been kept in good condition. The color in the flat-lay image is the closest representation of the actual color. It will be compressed for shipping. Thank you for your understanding.