If i tumble dry my shirt a second time, will it shrink?
The only way to shrink the shirt is to alter it. If you do not sew, maybe you know someone who does. If not, many dry cleaners also do alterations. This is a very easy sewing project that I’ve done many of times. If you try to shrink the shirt by washing it in hot water and then drying the heck out of it, it won’t shrink much and you might end up damaging the shirt. Plus, even if it does shrink, the shrinking will be temporary and unpredictable. Honestly, the only way to shrink your shirt is to have it altered. Or possibly you could return it, since it’s new.