Across the group the adjustable heights span roughly 3 ft to 10 ft. Mini/kids systems start as low as about 3 ft, some youth/portable units list mid ranges around 4.3–8.2 ft, and many regulation-style portable hoops adjust up to a full 10 ft.
Most portable hoops use a fillable base that accepts water or sand for ballast. Some larger models list specific fill capacities, and one model mentions a gel powder that solidifies inside the base to add extra stability.
Many units are designed for mobility: several portable hoops include built-in wheels (usually two) for tilting and rolling, and the rebounder model folds flat for compact storage and easier transport.
Common stability features include fillable bases (water or sand), wide/anti-tip base designs and built-in wheels for easier movement. One listing also mentions a gel powder that solidifies inside the base for added stability.
