This is an authentic Arsenal jersey from the 2014/15 season. It's a foreign M size, but because it's made of compression material, it fit me (177cm, slender build) with a little bit of room to spare. I hope this helps you. I don't play, so I've hardly worn it. I've kept it in my collection since I bought it, but please understand that it's been stored by a private individual, so only purchase if you're okay with that.