The Widowmaker RTA by Vandy Vape is 25mm in Diameter & 51mm in Height (Length). The Juice Capacity is 5mL / 6mL. It has Dual Airflow Intake (Bottom & Side), Dual Airflow Regulation, & Dual Juice Regulation. It comes with 3 Adjustable Airflow Rings to customize your Air Intake Preference. It is available in 2 Colors