The business of replica football shirts has never been bigger with companies paying millions of pounds to win the right to produce them for the biggest teams.
As fans, wearing the same shirt as your team is a representation of your support, with many thinking that paying £60+ to wear a walking advertising board confirms their dedication.
The sale of football shirts now forms part of a multi-billion pound industry of replica sports gear, providing extra cash into the huge pot that football already commands from television sales and matchday revenue.
According to The Richest, which also provided the details for this list, Nike and Adidas shared 75% of the market in 2012, taking home a cool £2.5 billion in football related goods.
Despite the increasingly sponsor-filled fronts, people have never been more keen to buy their favourite team's colours.
Here are the top 10 best selling shirts in world football over the last three years.