I'm a big fan of retired jerseys being designed in the style of the era the honored players were associated with. Here's a mock up I did of the FTX Arena rafters
Memories of retired numbers
Have the New York Yankees Retired Too Many Numbers? - DailyNewsGems
New retired numbers sign going up in the stadium : r/DenverBroncos
Dodgers retired numbers: Other players to wear uniforms before honor - True Blue LA
By the Numbers: Retired Digits
All-time list of retired numbers in the NBA
How many former Lakers players have had their numbers retired? Complete list - AS USA
Every NHL team's likely next retired number
History of retired numbers dates back to Lou Gehrig Day