paper clip
US /ˈpeɪ.pər ˌklɪp/
UK /ˈpeɪ.pər ˌklɪp/

1.
trombone
a device used to hold sheets of paper together, usually made of a looped metal wire
:
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Please use a paper clip to attach the receipt to the invoice.
Veuillez utiliser un trombone pour attacher le reçu à la facture.
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I need to buy a box of paper clips for the office.
Je dois acheter une boîte de trombones pour le bureau.