SizerooGuessroo · All sizes

How far does hair grow in a month?

12.5 mmAbout 0.49 in · Handheld

About 1.25 cm, or half an inch.

12.5 mm
a dime's thickness

To scale: a month of hair growth is about 9.3× bigger than a dime's thickness.

Think you can guess sizes? Play today's Sizeroo

Things about the same size

Many real things vary in size, so we use a typical or official figure. Spotted a mistake? Email [email protected].