Skinny Minnie and two of her gang members
The full gang
Skinny Minnie's Gang is composed of Skinny Minnie, Boney Mahoney, Diet Wyatt, and Scrawny Arnie. They are all incredibly thin criminals who use their thinness to sneak into small areas (such as deposit boxes and the small holes of armored cars) to rob them.
They are also able to use their thin bodies to hide in tight areas, such as guns and vases.