How many steps does it take to convert the Orion Pax figure between modes?

It converts between robot and Cybertronian truck mode in 20 steps.

What size is the Transformers One Orion Pax action figure?

The Transformers One Orion Pax action figure stands 5 inches (12.5 cm) tall in robot mode.

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Transformers One Studio Series Deluxe Class Orion Pax Action Figure 5-Inch

TRANSFORMERS: ONE ORION PAX: Studio Series figure with movie-inspired deco and details stands 5 inches (12.5 cm) tall in robot mode - bringing the young Optimus Prime to life
CONVERTS IN 20 STEPS: Converts between robot and Cybertronian truck mode in 20 steps for authentic Transformers: One transformation play
MOVIE-INSPIRED ACCESSORIES: Includes mining saw, blasters that become smokestacks in truck mode, and a map hologram accessory that attaches to his arm
ARTICULATED FOR PLAY AND DISPLAY: Studio Series figures feature articulation for display-worthy poses - perfect for recreating iconic scenes from Transformers: One
BUILD YOUR STUDIO SERIES LINEUP: Pair with other Studio Series figures to create a display that is More Than Meets the Eye. Ages 8 and up