What is a group of Sizes called?

A group of sizes is commonly called a Range. Other collective nouns you may see include Assortment and Selection.

Collective nouns for sizes are words used to refer to groups or collections of objects or living beings based on their size. These nouns allow us to describe different quantities of items in relation to their size, creating imagery and evoking specific meanings and associations. One particular example of a collective noun for sizes is "a set." Used to describe a group of objects or entities with a common characteristic or purpose, this collective noun hints at a collection of items that may vary in size but possess a specific relationship or interdependence. For instance, "a set of pears" suggests a group of pears of different sizes and shapes, yet still constituting a coherent unit, together forming a visually appealing display or offering. Another collective noun relating to sizes is "a pair." This term is primarily used when referring to two similar objects or living beings that are considered as a single set or combined unit. It most commonly implies a relationship of symmetry, balance, or complement, noticeable by how both entities share certain similarities in shape or proportions. For example, "a pair of shoes" represents two footwear items that are matched in terms of size, style, and purpose display or wearing. Additionally, a noun like "a swarm" can also allude to collective sizes by denoting a large, indeterminate multitude of animals or insects that gather and move together. Though it does not directly refer to size based on literal measurements, it relates to quantity and the concept of a multitude. For example, "a swarm of bees" may consist of thousands of individuals, visually forming a mass of varying sizes in flight or around a hive. In conclusion, collective nouns for sizes allow us to vividly express the relationship between multiple objects or entities based on their size or quantity. These nouns create imagery and highlight the interplay of sizes, revealing coherent units, symmetrical pairings, or vast multitudes, thus enriching our language with descriptive power and conveying specific meanings.