Customizing "Sale" flag with different words

Site URL: http://ginnydi.com

I'm using this code to change "Sale" to "Pre-Order":

.product-mark.sale {
    font-size: 0;
}
.product-mark.sale:before {
    font-size: 15px;
    content: "Pre-Order";
}

It's working mostly as intended, but for some reason it made the actual rectangle of the "flag" behind the text much narrower.  You can see it on this test page, but I've also attached a screenshot of it for posterity. You can see that compared to the "Sold Out" flag to the right, the flag is much thinner. How can I fix this?

1 hour ago, paul2009 said:

The code is just slightly oversimplified. If you add a line height it should be fine. For example, here's the second part of the code, with this added:

.product-mark.sale:before {
  font-size: 15px;
  content: "Pre-Order";
  line-height: 1em;
}

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That fixed it perfectly!! Thank you so much!