throw pillow
US /ˈθroʊ ˌpɪl.oʊ/
UK /ˈθroʊ ˌpɪl.oʊ/

1.
a small, decorative pillow used to adorn furniture, such as sofas or beds
:
•
She arranged the colorful throw pillows on the sofa.
•
The bed was covered with a duvet and several soft throw pillows.