over-the-knee socks; knee-high socks
Wasei-eigo from English 'knee-high socks', but in Japanese it typically refers to socks that reach above the knee. Often associated with school uniforms or fashion. Compare オーバーニーソックス, which is a synonym.
wasei-eigo (Japanese-coined English), from knee-high socks
See also: オーバーニーソックス
She wears over-the-knee socks with her school uniform.
These knee-high socks are warm and perfect for winter.