I have the older Stab Lab model (Mk III) and have never owned a MacBook Air, but Googling the newest versions of both:

Star LabTop Mk IV [1]:

Thickness: 0.58 inches (1.48 cm)

Weight: 2.2 pounds (1 kg)

MacBook Air [2]:

Thickness: 0.63 inch (1.61 cm)

Weight: 2.8 pounds (1.29 kg)

[1] https://starlabs.systems/pages/labtop-mk-iv-specification

[2] https://www.apple.com/macbook-air/specs/