The white T-shirt in the image is not included. The size is M, and it's labeled as 150. My child wore it starting from size 140. The skirt length is 43 cm from the waist. The skirt does not have built-in shorts. It has a lining. The waist has a button and elastic in the back. The bustier has an adjustable waist with a belt. The shoulder straps are adjustable with buttons. It has elastic in the back. The material can be worn in seasons other than summer. This is a used item, so please purchase if you don't mind.