What is too small?

The first thing that I think about my topic 'Canteen too Small' is: how to judge a canteen is too small or not. Some people could say that a canteen is too small while some could say that it is big enough. I did some research to answer this question "What is too small?

From the research I found out that each space has its own ideal size according to the function. For canteen, the ideal size is 1 square meter per person. It means if the number of people in a canteen is 100, so the ideal size of that canteen is 100 square meter. If the size is smaller than the ideal size, the canteen is considered too small.

It can be said that 'too small' is a condition when the size of a space is smaller than the ideal size, or a condition when the size of a space is not suitable with the number of people.

Source: 
Furness, Andrew, and Muckett, Martin. Introduction to Fire Safety Management. England: Butterworth-Heinemann, 2007.