This logo is the signal that the jersey is 100-percent authentic. Replicas are not allowed to carry the embroidered NFL logo. They can feel a bit funny and have lots of extra room in the shoulders because NFL players wear shoulder pads. The sleeves have elastic at the ends, making it feel as if somebody's hands are cupped around your biceps. The shirt can be washed in the machine but must be hung on a hanger to dry because excessive heat can cause creases in the numbers.
Replicas can be baggy, but authentics are snug.
Part of this is because of a thick elastic fabric that runs down the sides of authentics. Because of this strip, a size 52 authentic is more form-fitting than a replica. If you are comfortable with the feel of a size 52 replica, you might want a size larger in an authentic. From there, you can navigate to Web sites that offer an array of choices. Local stores specializing in sports apparel offer authentic Lions jerseys, but don't expect to find them at the mall or at retail outlets like Meijer or Target.