What is a 5 o'clock Shadow? '5 o'clock shadow' refers to the faint stubble growth that many men get in the late afternoon when it's been a whole day or so since their last shave.

What is 5pm shadow?

: the beginning of a beard that shows up late in the afternoon on the face of a man who has not shaved since morning.

How long is 5 o'clock shadow?

The 0.4mm stubble beard is more commonly known as the 5 o'clock shadow, which is approximately the beard length an average man has at 5 PM after a shaving in the morning. 0.4mm is also the length most beard trimmers will cut down to without a guard and typically the shortest length available on a stubble trimmer.