“Clothes” is a word many Japanese students of English find difficult to pronounce correctly.
In English, “clothes” is said altogether in one sound [clothz]. But many students use two sounds to say the word [cloth]-[sez]. This is because saying the “th” and “es” sounds together is hard.
Remember, English is spoken in many countries, so people are used to hearing different accents. But a change in rhythm (or number or sounds) can cause problems.
So, when you say “clothes”, try pronouncing it the same way as “close” (e.g. Please close the door). The listener will understand your meaning easily from the sentence, and you will sound much more natural.
Go ahead, practice: “I bought some new close (clothes) yesterday.” “Clothes”という言葉は、英語を勉強する多くの日本人の方にとって、正しく発音するのが難しい言葉です。