SOLOCOTEGirls White Blouse Ruffle Long Sleeve Button Down Shirts Princess Cotton Loose Soft Tops Spring and Summer 3-14Y

I really like this girls white shirt, very cute and beautiful, would you pls help me to choose the size? My daughter is 7 years old.

What is the difference between size 13-14 years and 13-14y? Is 13-14 bigger?

Is it only a shirt? Or does it come with the skirt.

Es solo la blusa?