Placeholder font-size bigger than 16px

Question

I have read a couple of articles about styling the placeholder of an input field using ::-webkit-input-placeholder in HTML5. It works perfectly, except for one thin

Answer 1

input {
    width: 450px;
    padding: 0px 15px;
}

input,
input::-webkit-input-placeholder {
    font-size: 25px;
    line-height: 4;
}