Personalized CPA Pain T-Shirt. CPA Certified Pain In the Ass T-Shirt - White. This humorous twist on the phrase Certified Public Accountant is a funny design for birthdays, graduation, holidays and tax season. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.