They’re already miniature, so you can only imagine the cuteness that ensues when there are baby versions of them. Meet the pygmy marmoset: a primate known to be the smallest known species of monkey in the world. The average size of one of these creatures is about 15 centimeters (or 5.9 inches) with a 20-centimeter long tail. So as infants, they can be the size of just one of your fingers! And if you don’t “Aww” at least once while watching this video of a mama PM and her twins, then see if you can get through the gallery below. It’s cute animal overload!