Personalized Royal Trombone Teacher Youth T-Shirt. Trombone teacher text wearing a crown and a trombone drawing is a humorous design for your trombone teacher at back to school and graduation. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.