As differences can be very subtle, it helps to look up an image of the actual logo for comparison. You may also want to use something like a magnifying glass to get a very close look at the Ralph Lauren logo on your product.
High quality replicas can be extremely similar to authentic size labels, so look at a picture of a genuine size label online to compare it to your shirt’s label. Even small changes in the font, including changes in spacing, can indicate a fake.
As with other aspects of fake products, differences can be very subtle. It can help to look up a picture of a genuine Ralph Lauren label online to compare and contrast.
In higher quality counterfeit products, differences may be extremely subtle. Look up a photo of a genuine Ralph Lauren label online and compare and contrast this to your bag’s label.
Designer products tend to be very high quality. It is unlikely that a designer bag would have any obvious flaws and imperfections.