The size of a shirt depends on how big your chest is. To figure this out, measure the distance around your chest at the widest part, usually just below your armpits.
A size L shirt is usually made for people with chest sizes between 42 and 44 inches. So, if your chest measures in that range, a size L shirt should fit you.
If you're not sure what size shirt you need, it's a good idea to try it on before buying. You can also ask a store worker for help finding the right size.
Think of it like putting a ribbon around your chest under your armpits. The length of the ribbon is your chest size. If it's between 42 and 44 inches, then a size L shirt is right for you.
Picture yourself in front of a mirror, wearing a shirt. The shirt should fit comfortably, not too tight.You should be able to move your arms easily without feeling restricted. If the shirt feels like this, it's a size L.
Remember that shirt sizes can vary between brands and styles. So, trying it on is the best way to be sure. But as a general rule, if your chest is 42 to 44 inches around, a size L shirt is a good choice.

