html input size
Syntax
<input size="number">
Example
An HTML form with two input fields with a width of 50 and 4 characters:
<form action="/action_page.php">
<label for="fname">First name:</label>
<input type="text" id="fname" name="fname" size="50"><br><br>
<label for="pin">PIN:</label>
<input type="text" id="pin" name="pin" maxlength="4" size="4"><br><br>
<input type="submit" value="Submit">
</form>