What is the size and weight of the 360 ball? Kim Breimeier September 03, 2020 16:49 Approximately 8 inches/20.3cm in Diameter. It weighs only 20 Oz/.6kg. Related articles How much do the Mass Core cylinders weigh? How is monkii 360 different from Isocore? Which Mass Core should I choose? What is the weight limit of monkii 360? Is monkii 360 travel-friendly? Comments 0 comments Please sign in to leave a comment.