Young College Girl Wearing Sport Jersey

In some sports, such as baseball, basketball, and American football, a player's jersey may be "retired". When a jersey is retired that player's jersey is placed usually where the team plays in honor of that player's accomplishment. The retiring of a jersey at one time included the retiring of the number on the player's jersey leaving it unavailable for future players, to further honor that player. However as jerseys are usually double digit (00-99), that leaves only 100 possible numbers—if the rules of the sport allow it. For example, in U.S. college basketball, only 36 distinct numbers are possible, as rules prohibit the use of any digits greater than 5. As such the practice of retiring the number has dwindled, and in most cases only the specific jersey is retired and put on display.
Other
It is common for Australian and South African year 12 students and year 13 students in New Zealand to receive personalised jerseys during their last year at school. These are commonly referred to as a year or leavers' jumpers. They are based on the design of a sport jersey (usually Australian Rules Football or Rugby), feature school colours, the year the students graduate, and a personalised nickname. They are usually worn over the normal school uniform.