html change size code example

Example 1: make text bigger html5

p {
  font-size: 15px;
}

p {
  font-size: large;
}

p {
  font-size: 150%;
}

Example 2: html font size

<span style="font-size:20px;"></span>

Example 3: html font size

font-size:20px;

"default size is : +-16px;"