Size of Units

As you can see above, three sources offer rigid boxes and the 4th offers 3 sizes of soft flexible pads. Here are each in more detail.

RedRush360 Size: 10.6″ Wide x 16.3″ Tall x 2.6″ Thick – Weight: 13lbs

REDjuvenator Size 18″ Wide x 18 ” Tall x 2″ Thick – Weight 12 lbs

Joovv specs:

Ultimate Lights pads are in 3 lengths – all are 12 inches wide. 
Two – 40″ light pads.
Two – 30″ light pads.
Two – 24″ light pads.

More details about RedRush360 Specs are 
Power: 360 Watts 
Voltage: 100-240V
LEDs: 120 x 3W LEDs (60 x 660nm / 60 x 850nm)
Irradiance:
>250 mw/cm2 max
100.5 mw/cm2 at 6″ – for deep tissue
47 mw/cm2 at 18″ – for energy
15 mw/cm2 at 36″ – for skin
EMF: 0.0uT at 6″
Cooling Fans: 2
Lifetime: 50,000 Hours