noun which may take the genitive case particle 'no', noun
knee-length
Used for clothing that reaches the knees, such as skirts, dresses, or shorts.
彼女は膝丈のスカートをはいている。
She is wearing a knee-length skirt.
このワンピースは膝丈で、オフィスにぴったりだ。
This dress is knee-length and perfect for the office.
Compound of 膝 (hiza, 'knee') and 丈 (take, 'length').