It appears as though you need to explicitly set a font, and change the line-height
and height
as needed. Assuming ‘Times New Roman’ is your browser’s default font:
span {
display: inline-block;
font-size: 50px;
background-color: green;
/*new:*/
font-family: 'Times New Roman';
line-height: 34px;
height: 35px;
}
<span>
BIG TEXT
</span>