https://cz.diesel.com/trousers-and-shorts/regular-short/A064...

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Note added at 26 mins (2023-04-07 22:22:25 GMT)
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Shorts like trousers do not have a singular and always referred to as "a pair".
https://forum.wordreference.com/threads/one-shorts-or-a-pair...

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Note added at 28 mins (2023-04-07 22:24:33 GMT)
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Don't say `a pants' or `a shorts'. You can say a pair of pants or a pair of shorts. It doesn't take long to choose a pair of pants. He is wearing a pair of shorts and a T-shirt.

https://grammar.collinsdictionary.com/english-usage/what-is-...

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Note added at 29 mins (2023-04-07 22:25:23 GMT)
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"Pair,” from the Latin, means two like things. And pants (pantaloons) were originally two like things. You put them on one leg at a time because they actually came in two pieces

https://www.sandiegoreader.com/news/2011/may/11/straight-ema...