These 13-piece burr puzzles can fit in the palm of your hand. Inspired by the pygmy marmoset, the smallest monkey in the animal kingdom, two different options are available, "Pygmy" and "Marmoset." The puzzles are identical from the outside but each requires a different solution to piece together (the puzzles arrive disassembled).

Made from 9mm rods, with an overall size of approximately 1.75 x 1.5 inches. "Pygmy" and "Marmoset" weigh just over half a pound each. Don't let the size fool you; these dense little clusters of brass are still quite challenging compared to a traditional six-piece burr puzzle.The tiniest offerings yet from the cheeky British puzzle animals at Two Brass Monkeys.