La Galaxy Football Shirt I Bought A LA Galaxy Football Shirt With The Beckham 32 On The Bag But It Is A Size Large-how Can I Shrink It?

I bought a LA Galaxy Football shirt with the beckham 32 on the bag but it is a size Large-how can i shrink it? - la galaxy football shirt

Only numbers and letters on the back - how can I reduce - that's all original material of football?

Please help ...