The Sword in the Stone - Madam Mim

Madam Mim Disney pin inspired by the animated classic The Sword in the Stone. 
The pin is a collectible item featuring the character Madam Mim in her witch form. 
It appears to be part of a limited edition or specific series, possibly related to a D23 event or a 60th-anniversary celebration of the film. 
The design includes a purple, textured element, likely representing her magic or a transformation effect.