HUGE: 29 inches in diameter. Adult size Hopping Balls are perfect for “adults,” 5’4” to 6’4” EASY TO INFLATE: A Double-action hand pump is included. Inflate your Hopper Ball in under 5 minutes UNACCEPTABLE: Borrowing a child's Hippity Hop Ball . 45cm diameter childrens’ Space Hoppers, 65cm adult Space Hoppers and a giant 85cm Retro orange Space Hopper. You have a choice of base colours, and we can print your branded logo or message onto either one or two sides. We offer a full collation service, so we can pack each Space Hopper with its own small hand operated inflation pump.