css input placeholder text size code example

Example 1: input checkbox size css

input[type=checkbox] {
    transform: scale(1.5);
}
<label><input type="checkbox"> Test</label>

Example 2: html css placeholder input font-size

Placeholder text will automatically inherit the font family and font size of the regular input text, but you may be in a situation where you want to change the placeholder text color. You can accomplish that with the ::placeholder pseudo-element.