Each inch of hair corresponds to about two months.

每长一英寸的头发需要大约两个月。

youdao

I want about an inch off the back of my hair.

我想把脑后的头发剪短约一英寸。

《牛津词典》

An inch taller than I, he had a lean, muscular frame, clear blue eyes, blond hair and a strikingly handsome face.

他比我高一英寸，身材修长，肌肉结实，蓝蓝的眼睛，金黄的头发，还长着一张异常英俊的面孔。

youdao

But size isn't everything, and even an inch of hair here and there can make all the difference.

BBC: Moustaches under threat

Jack is 5ft (1.52m) tall, with blonde straight hair and has a half-inch scar on his forehead.

BBC: Missing Darlaston children: Police 'very concerned'

He received round-the-clock care from vets and nurses who removed 13kg (2st) of hair, clipped his two-inch long claws and removed cysts and grass seeds from his paws and ears in a two-hour operation.

BBC: Floyd with Wood Green staff member