Personalized 2021 Kiss My Class Goodbye Youth T-Shirt. Kiss My Class Goodbye! Say goodbye to the class of 2021 with a kiss. You know where. Funny gift for your graduate. 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.