As suggested by Jerome B, VA3JKW, and decided by the Ham Radio Crash Course Facebook Group, here is a matrix style shirt with a CW waterfall.
This classic fitted tee includes durable features such as seamless double needle collar, taped neck and shoulders, and a double needle sleeve and bottom hem. It's made from 100% cotton; with the exception of two colors: Sport Grey color is made from 90% cotton and 10% polyester; while Dark Heather color is made from 50% cotton 50% polyester blend. Care Instructions: Machine wash and tumble dry on low.
MODEL: 2000 Fine Jersey Short Sleeve Crew Neck
MATERIALS: 100% cotton, 6 oz (203 g/m2), Sport Grey is 90% cotton/10% polyester, Dark Heather is 50% cotton/50% polyester.
FEATURES: Classic Fit, Pre-shrunk, Shoulder-to-shoulder taping, Quarter-turned to avoid crease down the middle, Tear away label.
CARE: Safe to machine wash and tumble dry on low
PACKAGING: Packaged in a poly mailer
PRODUCTION TIME: 6-9 business days (Average)
S - Width 18” X Length 28”
M - Width 20” X Length 29”
L - Width 22” X Length 30”
XL - Width 24” X Length 31”
2XL - Width 26” X Length 32”
3XL - Width 28” X Length 33”
4XL - Width 30” X Length 34”
5XL - Width 32” X Length 35”