balletballet says:

Loose fitting boys shorts, perfect for all dance disciplines. 

Manufacturer says:
• Dancers baggy shorts with RAD logo. This approved garment has been made by Freed of London Ltd and has been designed in conjunction with and is recommended by the Royal Academy of Dance for use in exams.

• Grades : Boys Pre-Primary & Primary

• Fabric : Poly Cotton Lycra

• Child waist sizes : 20", 22", 24", 26"