bobble hat

US /ˈbɑː.bəl ˌhæt/
UK /ˈbɑː.bəl ˌhæt/
"bobble hat" picture
1.

a knitted hat with a bobble on top

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He wore a warm bobble hat to keep his head cozy in the snow.
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The child looked adorable in her new pink bobble hat.
:
pom-pom hatbeanie with a bobble
:
hathat tipcowboy hatbucket hathard hatsun hattop hat