Make everyone laugh with this clever science joke T-shirt featuring the phrase “Protons Have a Mass I Didn’t Even Know They Were Catholic.” Perfect for physics lovers, science students, nerds, geeks, teachers, and STEM fans who enjoy smart humor and wordplay. Great gift for chemists, physicists, science majors, engineers, and anyone who loves witty jokes about atoms, particles, and mass. Comfortable, eye-catching, and ideal for casual wear, school, university, or science events. Size Details: S M L XL 2XL 3XL 4XL Width, in 18.00 20.00 22.00 24.00 26.00 28.00 30.00 Length, in 28.00 29.00 30.00 31.00 32.00 33.00 34.00 Sleeve length, in 8.90 9.20 9.50 9.70 10.00 10.40 10.80 Size tolerance, in 1.50 1.50 1.50 1.50 1.50 1.50 1.50 This classic unisex jersey short sleeve tee fits like a well-loved favorite. Soft cotton and quality print make users fall in love with it over and over again. These t-shirts have-ribbed knit collars to bolster shaping. The shoulders have taping for better fit over time. Dual side seams hold the garment’s shape for longer. .: 100% Airlume combed and ringspun cotton (fiber content may vary for different colors) .: Light fabric (4.2 oz/yd² (142 g/m²)) .: Retail fit .: Tear away label .: Runs true to size
