What's the length of the inflatable surfing board?

Surfing is an ancient Polynesian culture. Their chiefs are the most skilled surfers in the tribe and have the best surfboards made from the best trees. Do you know the length of the inflatbale surfing board?

Inflatable surfing board is a kind of sports equipment used for surfing. The surfboard used initially was about 5 meters long and weighed 50 to 60 kilograms. After World War II, foam plastic sheets appeared and the shape of the board was improved. The surfboards used now are 1.5-2.7 meters long, 60 cm wide and 7-10 cm thick. The boards are light and flat. The front and rear ends are slightly narrow. There are tail fins that play a stabilizing role at the bottom of the boards. Some are too long to be tied to the roof of the car. However, they must be tied up. The correct way to tie a surfboard to the roof must be at the end of the rudder.