Need a New Car Show T-Shirt? 2021 'Mopars In May' shirts available!

Sorry, I don't know how to completely answer that question.
My t-shirts from this manufacturer fit well. I don't have any complaints and don't recall hearing any complaints. I guess you could always wash them in extremely hot water to make them more "fitted".
We use the same screen printer that supplies event shirts to the long-running Grand National Roadster Show held each year at the Fairplex in Pomona, CA (except for 2021 due to COVID-19 restrictions).