Once you go Giant Jumbo Jack Black you will never go back. The Giant Jumbo Jack is the best boyfriend you will ever have...and the biggest you will ever want. Measuring 15 inches long and 3 inches wide and 9 inches in circumference from ball to head. The Giant Jumbo Jack is free standing, with a solid rubber base. Made of latex-safe polymer vinyl rubber. The Giant Jumbo Jack is safe to use with any water or silicone based lubricants and with this size you are definitely going to need the lube.