Here in the UK a similar thing is happening at least to mens clothing. Over here an XL is usually 42-44 inch chest, I think it is similar in the US. Due to my chest size (46 inches) I often cant fit into even an XL piece of clothing, although it depends on the type of material. T shirts are usually alright, but button up shirts are a nightmare. Usually even if I choose the size up all that happens is that it gets longer and wider at the waist whilst shoulders/vhest stay the same. These days men dont want to be told theyre small so everything is down a size. I compared a superdry XL polo from last year to a medium I had from like 4/5 years ago (same brand) and the chest was almost exactly the same size, whilst the XL was just much longer and slightly wider.