A kind of room · also called schoolroom

2 views: its portrait, and how it looks in the comparison photos.
About
A standard classroom is an enclosed learning space spanning the length of a full-size city bus.
Classroom sizes vary depending on the age group and school type. A standard elementary or high school room accommodates between 20 and 30 students, while university lecture halls can be four to five times larger. In contrast, dedicated seminar rooms and preschool spaces are often half this length. The total weight reflects the heavy drywall, framing, floor slabs, and desks required to block outside distractions.
From Wikipedia
A classroom, schoolroom or lecture room is a learning space in which both children and adults learn. Classrooms are found in educational institutions of all kinds, ranging from preschools to universities, and may also be found in other places where education or training is provided, such as corporations and religious and humanitarian organizations.
Read more on Wikipedia →Text from Wikipedia’s “Classroom” article, CC BY-SA 4.0.
2 on the site
Weight
27.6 US tons (25 tonnes)
Quick answer
A standard classroom measures about 30 feet (9 m) long and 10 feet (3 m) tall, with a structural weight of roughly 55,000 pounds (25,000 kg). This length is similar to parking a city bus inside the building.
Typical figures, the same ones every comparison on the site uses; real ones vary.
More like a classroom
Compare it
Next to anything: a person, a car, another room.