There are nine different creatures in the initial release of Monstaz. Each one comes in three sizes. The large version is 8 inches tall, the regular version is 5.25 inches tall and the key-clip version is 2.75 inches tall. Sizes vary slightly. The swing tag for each Monstaz shows its birthday and information about the creature. The swing tag on the initial release of Monstaz is a new design. The Ty heart/logo swing tag has been replaced by a custom Monstaz swing tag.