This tee has a "slim fit", which means it's more of a style-driven cut than a standard, boxy adult cut tee. It does run tighter, as a result. Our best advice for choosing a size:
If you like your shirts tight, go with the size you normally wear. If you like your shirts form fitting, but not too tight, go one size up from a standard/average size tee you would buy. If you like your shirts loose, go up two sizes.
S - Small - fits sizes 2-4 M - Medium - fits sizes 6-8 L - Large - fits sizes 8-10 XL - Extra Large - fits sizes 10-14 2XL - Double Extra Large - fits sizes 14-18