The word for “clothes” is singular in many languages, e.g. la ropa in Spanish or die Kleidung in German, and its plural in most contexts does not even make sense (you would virtually never hear someone say las ropas or die Kleidungen). In English, however, the situation is completely reversed.
The word “clothes”, pronounced /kləʊðz/ or /kləʊz/ in the UK and /kloʊðz/ or /kloʊz/ in the US, is only used in the plural:
The word “clothe” is not the singular of “clothes”, as one might think. It is a verb meaning “to dress” or “provide clothing” and sounds quite formal and is not very common. For example, a newspaper headline could read “Third-World parents are desperate to feed and clothe their children”.
Also, don’t confuse “clothes” and “cloths”. A cloth (pronounced /klɒθ/ (UK), /klɔːθ/ (US)) is a piece of fabric. For example, you can wipe a table with a damp cloth.
Finally, there is “clothing”, a singular noun similar in meaning to “clothes”, but it is typically used to refer to a certain type of clothes, e.g. “protective clothing”, rather than a particular piece of clothing:
When referring to a specific “number of clothes”, we would say “piece of clothing”, “article of clothing”, or “item of clothing”, for example:
There is also a more traditional and formal word for a piece of clothing: a garment. It is not so common in spoken language, but it still popular in print publications.