This badge features the colours of the Pansexual Pride Flag. This flag was created around 2010.
The flag first appeared on various internet sites in mid-2010 and is used to increase visibility and recognition of the pansexual community, and to distinguish it from bisexuality. It is also used to indicate that pansexuals have sexual attractions and relationships with people of different genders and sexualities.
Source: Wikipedia – Pansexual Pride Flag
The badge comes in two sizes. 44mm and 32mm diameter with plastic backing.