<big>
HTML <big> tag
The <big> element is used to increase the font size by one conventional unit. The font in HTML is measured in conventional units from 1 to 7, the default text size is 3.
This element makes the text one size bigger. However, the text cannot be larger than the maximum font size of the browser. （此元素使文本放大一倍。但是，文本不能大于浏览器的最大字体大小。）
The <big> tag is placed within the <body> tag.
The <big> is a deprecated HTML tag, and it is no longer used in HTML5. Use CSS styles that control font size instead.
Syntax
Syntax （语法）
The <big> tag comes in pairs. The content is written between the opening (<big>) and closing (</big>) tags.
Example of the HTML <big> tag:
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
</head>
<body>
<p>This text is normal.</p>
<p><big>This text is bigger.</big></p>
</body>
</html>
Result
Now let’s consider another example, where we use the CSS font-size property to make the text bigger. （现在让我们考虑另一个示例，其中我们使用CSS font-size属性来放大文本。）
Example of the font-size property:
<!DOCTYPE html>
<html>
<head>
<title>Title of the documnet</title>
<style>
p {
font-size: 16px;
}
span {
font-size: 19px;
}
</style>
</head>
<body>
<p>
This text is normal,
（这是正常的）
<span> and this text is bigger.</span>
</p>
</body>
</html>
Result
Attributes
Attributes （属性）
The <big> tag supports the Global Attributes.
How to style <big> tag? Common properties to alter the visual weight/emphasis/size of text in <big> tag:
CSS font-style property sets the style of the font. normal | italic | oblique | initial | inherit. CSS font-family property specifies a prioritized list of one or more font family names and/or generic family names for the selected element. CSS font-size property sets the size of the font. CSS font-weight property defines whether the font should be bold or thick. CSS text-transform property controls text case and capitalization. CSS text-decoration property specifies the decoration added to text, and is a shorthand property for text-decoration-line, text-decoration-color, text-decoration-style.
Coloring text in <big> tag:
CSS color property describes the color of the text content and text decorations. CSS background-color property sets the background color of an element.
Text layout styles for <big> tag:
CSS text-indent property specifies the indentation of the first line in a text block. CSS text-overflow property specifies how overflowed content that is not displayed should be signalled to the user. CSS white-space property specifies how white-space inside an element is handled. CSS word-break property specifies where the lines should be broken.
Other properties worth looking at for <big> tag:
CSS text-shadow property adds shadow to text. CSS text-align-last property sets the alignment of the last line of the text. CSS line-height property specifies the height of a line. CSS letter-spacing property defines the spaces between letters/characters in a text. CSS word-spacing property sets the spacing between words.