Batman: The Animated Series - "4" Pinback Button Badge (90s)

Curious badge, that we’ve had trouble finding info on. Seemingly, it might just be from a line of licensed party supplies, most likely from a themed birthday card. You could also combine it with another numbered badge, if they turn... 54, 56 etc (we only have 4, 5 and 6 in stock, at the time of writing). Condition: Great