This is the worlds smallest bird. which is about 5.5cm long and weighs around 1.6 to 1.8g. But the largest among Humming birds is the Giant Humming bird it measures 23 cm in length and 18-20g in weight. The male bird is a bit smaller than the female. It also lays the smallest egg among all the birds which is even smaller than a coffee bean.
Lenght: 5.5 cm
Weight: 1.6 – 1.8 g