There are three different sizes:

STARTER TWIN PACK: ($7.95) The Starter size is perfect for small hands (ages 5 - 10)

DELUXE TWIN PACK: ($9.95) The Deluxe size Tetra Tops are excellent for adults.

Each Twin Pack includes: • 2 Tetra Tops™ • 2 Matching Trading Cards • Launch Manual

EXECUTIVE DESK MODELS: ($16.95) Executive Desk size are large versions (balls are aproximately 1" in diameter) sold seperately.

In the photo at the top of this page:

The red and blue tops are Starter size, the green is Deluxe and most of the clear are Executive models.