Thanks.

Specifically, do authentic jerseys fit any differently than replicas?

Thanks.

One is expensive and low quality and the other is cheap and even lower quality. (Actually, authentic are manufactured under license from the owner of the trademark. ie: NFL licenses the names of teams and players and insists on minimal quality standards while collecting royalties)

Besides the year it was made. The materials are different (cotton and nylong back then vs. whatever we use today), the sizes are usually larger now than in the past, and the colors are usually bolder. Other than that - there is no difference.

Authentic jerseys are like the ones the actual players wear with the stitched on numbers and better material. The replica jerseys are just a version with cheaper material and usually screened on numbers, names, etc. The main difference is probably the price. Authentic can be very expensive.

One is authentic, and one is a replica.

Authentic jerseys are high-quality jerseys is made of durable, quick-drying polyester metallic StretchAir fabric with dazzle inserts for that comfortable feel. They are officially licensed by its respected pro league. In simple terms, this is the real gear that the pro players wear. The names and numbers are tackle twilled on the jerseys for that true professional feel.

Replica jerseys are made of breathable, quick-drying nylon mesh and has a flat rib knit collar and armholes. They too are officially licensed by the sport leagues, but they are not the quality of jersey the pros wear. You will still find all your favorite players and teams. The number are not tackle twill like on the authentic versions. They are screen printed for simulated look and feel.

While authentic's are the real deal they do cost more. Replicas are a real close match and sometimes more then half the cost.