The enhanced model is just 34 mm thick and weighs 520 g without batteries.

The new model weighs 12.2 kg and measures 58 cm in height.

The model is 18 feet 7 inches long and weighs about 1,350 pounds.

But that didn't help today, when the most popular models weighed little more than ninety pounds.

The average model weighs 25 per cent less than other women of their height.

The smallest model weighs four and a half pounds.

Several models weigh less than seven pounds, but can handle many tasks.

This model weighs half as much as the first one.

The original models weighed 1000+lbs and had a top speed of about 20 mph.

To show how far engineering has come, the earliest model in the exhibition weighs 150 pounds.