This is a 3-piece set. Purchased from Kobe Lettuce. PS size I am 148cm tall, and it fit perfectly. I only wore it for the entrance ceremony. This is a perfect 3-piece set for occasion scenes, consisting of a blouse, vest, and pants. The blouse features voluminous sleeves and a perfect length that looks great tucked in or worn out. The vest has a slightly flared silhouette towards the hem and a compact length that makes you look stylish. Pearl buttons add a touch of elegance, eliminating the need for accessories. The vest can be worn two ways, front and back, allowing for versatile styling depending on the occasion. The pants have a moderately relaxed tapered silhouette that also has a leg-slimming effect. Perfect as a mama suit for school events (graduation, entrance, and observation days), formal occasions, Shichi-Go-San (Seven-Five-Three Festival), coming-of-age ceremonies, office casual wear, or for everyday casual wear when worn separately. [Material and Size] The blouse uses an easy-care cotton blend fabric that is wrinkle-resistant. The vest and pants are made of a smooth, comfortable georgette fabric. Machine washable at home. You can wear it in spring, autumn, and winter depending on the inner layer. All three pieces are designed with a length and size that are easy for petite people to wear. The pants have an elastic waistband in the back for comfortable wear. Recommended as office casual wear or a mama suit. Entrance Ceremony, Entrance Ceremony, Graduation Ceremony, Graduation Ceremony