For mass distribution what sizes of t-shirts should we order?

It is always preferable to know the sizes of the users. There are various brands, each following their own size specifications. Therefore, to avoid disappoint to the receiver their shirt size should be taken as irrespective of the brand , shirt sizes are standard and then the same should be converted into t-shirts sizes as per the table below.

It is always preferable to know the sizes of the users. There are various brands, each following their own size specifications. Therefore, to avoid disappoint to the receiver their shirt size should be taken as irrespective of the brand , shirt sizes are standard and then the same should be converted into t-shirts sizes as per the table below.