The Creator 2.0 STTU169 unisex t-shirt is the correct t-shirt according to Innerfire (see updated printing guidelines).
Details including sizes here: Creator 2.0 | Premium blank unisex t-shirt | Stanley/Stella (stanleystella.com)
To maintain uniformity, all instructors shall wear the same shirt model during events.
This offer is online at least until Innerfire could fix their shop issues:-)
Stay happy, healthy, strong & goood looking with this shirt:-)