I’m not good at guessing measurements. I’m 6’1″, and that’s all I’m able to use to picture how tall something is. I was looking out my window, estimating how many of me it would take to reach the height of our window. Four. The answer is four.

I don’t know if that’s useful information to anyone else, but it worked for me. If someone asks for the measurements, I’ll have to explain that I’ve switched to a system based entirely on myself.

Sometimes a human is the only comparison that really shows the scale of things. These photos make a lot more sense once you notice the person standing there. Although now I’m wondering how tall each of those people is. I may need to stand next to them.

1.

Three giant horses with a person in front for scale, showing their enormous size.via twitter

2.

Comparison of a 6'9" man and a 5'1" woman in police uniforms standing back to back.via twitter

3.

Huge cactus in desert with smaller plants and rocks, under blue sky.via twitter

4.

Man holding a huge carp fish in a lake with trees in the background.via twitter

5.

400 years old Vasa ship with two people in front for scale.via twitter

6.

Elephant seal with a person touching its tail in a zoo enclosure.via twitter

7.

Person holding a large African land snail with a small snail on top.via twitter

8.

Large door unit with a chandelier and staircase in the background.via twitter

9.

Man standing next to a large brown horse, captioned 'Zeus is an absolute unit horse'.via twitter

10.

The manpupuner rock formations in a snowy landscape with a person for scale.via twitter

11.

Petra in Jordan with a person standing in front of the ancient rock-cut architecture.via twitter

12.

Mobile lifeguard stand on wheels at the beach with people nearby.via twitter

13.

A giant Quetzalcoatlus model with a person for scale in a museum.via twitter

14.

The sun and planets to scale showing Earth and other planets in our solar system.via twitter

15.

Two people sitting on the Abraj Al Bait clock tower in Mecca.via twitter

16.

Massive owl sitting on child's lap on a bus, with other passengers nearby.via twitter

17.

Baobab trees at Madagascar with a clear blue sky in the background.via twitter

18.

25-meter blue whale skeleton in London museum with visitors around it.via twitter

19.

A boat with people is seen from above, with a large whale swimming nearby in the water.via twitter

20.

Standing next to a large nuclear cooling tower with a green arrow pointing at its base.via twitter

21.

The Motherland Calls statue with a sword raised high against a blue sky with clouds.via twitter

22.

Aircraft carrier USS Gerald R Ford in drydock, viewed from front.via twitter

23.

Person standing in front of the Great Pyramid of Giza showing its massive size.via twitter

24.

Ouse Valley Viaduct UK with brick arches and a person standing in the center.via twitter

25.

Lowa class Battleship passing through the Panama canal with a six inch gap on each side.via twitter

26.

Person standing next to a large whale skull on a rocky hillside.via twitter

27.

People walking on a narrow bridge on a steep cliff at Tianmen Mountain National Park.via twitter

28.

Person standing in front of a fallen Redwood tree in a forest.via twitter

29.

Giant manta Ray captured off New Jersey coast in 1933, shown with a man for scale.via twitter

30.

Man in suit with Zweihander sword at Grutte Pier museum.via twitter