Only true Harley Quinn fans will know where those four diamonds come from.

Every girl's clamoring to dress up as Harley Quinn these days, with Margot Robbie pushing the character's fame to new heights.

While everyone's sporting "Daddy's Lil Monster" shirts and wearing pigtails to the mall, why not flaunt your fandom for the mad doctor with a subtle print shirt reminiscent of her classic four-diamond tattoo?

Our Harley Quinn Diamonds Women's T-Shirt features a straightforward, no-frills design -- it's appropriate attire wherever you go, and you won't even have to swing a big baseball bat around to show your Puddin' pride. 

If you're looking for your very own Mistah J, he definitely won't have a hard time picking you out in a crowd with this simple yet bold Harley Quinn t-shirt for women.

I mean, it says "Harley Quinn" right across the front -- how can anyone miss that?