Source: Animal Crossing: New Horizons
Including: T-shirt, as shown as you can see from the pictures.
Cosgeeker offers Authenic Animal Crossing: New Horizons Isabelle Cosplay Costume with Decent Price. All the details are identical to characters as shown as pictures. If a standard size can't fit you well, please click customize and fill your specific measurements into the blanks, then our tailors will make the costume according to your own measurements.