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CSS CSS Foundations Values and Units Relative Length Units

Richard Gibson
Richard Gibson
Courses Plus Student 2,832 Points

how do i set the rem back to its root html elements font-size. I thought the root was 16px but apparently not.

can anyone help plzzzzzzzzzz

2 Answers

Wayne Priestley
Wayne Priestley
19,579 Points

Hi Richard,

I think the answer your looking for is 1rem

h1 {
font-size: 2.5em;

p {
font-size: 1.5em;

.more {
font-size: 1rem;
Austin Whipple
Austin Whipple
29,725 Points

rem size is set at the root element of the page, so essentially the <html> element. Most browsers default to 16px as 1em, so to change the rem size from 16px to something else, set the font size on the html element:

html {
   font-size: 14px;

See an interesting post at CSS Tricks.