What part of speech is size?

"Size" can be multiple parts of speech depending on its use in a sentence:

* Noun: When referring to the extent of something, like "The size of the house is impressive."

* Adjective: When describing something as being of a particular size, like "The size difference between the two dogs is noticeable."

* Verb: Less common, but it can act as a verb meaning "to determine the size of something," like "The tailor sized me for a new suit."

So, the part of speech depends on the context!