paper clip

US /ˈpeɪ.pər ˌklɪp/
UK /ˈpeɪ.pər ˌklɪp/
"paper clip" picture
1.

a device used to hold sheets of paper together, usually made of a looped metal wire

:
Please use a paper clip to attach the receipt to the invoice.
I need to buy a box of paper clips for the office.