The term "small size" refers to something that is relatively small in dimensions, stature or quantity. It can be used to describe an object, person or thing that has a reduced amount of space, height, width or length compared to others within its category. For example, if you were describing the physical attributes of two cars, one might be described as having "small size" while the other is larger in comparison. Similarly, someone who is shorter than average could also be referred to as having a small stature. In summary, when something or someone has a smaller amount of space, height, width or length compared to others within its category it can be said to have a "small size".