As described in the FAQ, these authentic soccer jerseys are produced in Asia, mainly for Asian soccer players. Consequently, the sizing is significantly slimmer than your usual US sizes. To help you find a comfortable fit, use the conversion chart above: select your usual size in the list on the left-hand part of the table, and find the corresponding PHOOTYKITS size as indicated by the green cells.
Each standard US size corresponds to 2 different PHOOTYKITS sizes to further fine-tune your choice.
For example, if you're usually a "slim" XL, pick a 3XL size, if you're a big XL, 4XL is probably safer).
The chest dimensions in inches are also indicated in case you want to take a tape-measure to your torso, but as a general rule, if you want a looser fit, SIZE UP! And if in doubt, SIZE UP!