The Boundless CFC Lite Vaporizer is just 3.9", but don't let the small size fool you. It packs a mighty punch. The compact vape has three temperature settings for perfect heating and puffs every time. The external battery adds to the life of the vape. Even though she's tiny the CFC Lite Vaporizer has a full size oven! Pack it up. This is a great value. Order yours today!