where oh where oh where

Try using a browser tool like Firebug – it shows this:

.entry-header .entry-title {
    font-size: 1.57143rem;
}

Make very sure that you are not making any changes to theme files – instead you should make them to Custom CSS using a plugin or create child theme – otherwise your changes will be overwritten and lost when WP is updated. Further, it’s crucial to have a clean copy of the default theme for troubleshooting purposes.

Thanks. I tried changing that field again and and again and it doesn’t do anything. Here is what I have it set to now:

.entry-header .entry-title {
font-size: 40px;
font-size: 1.428571429rem;
line-height: 1.2;
font-weight: normal;

You are using font-size property twice in your style. Just comment/remove the second one “font-size: 1.428571429rem;”

That doesn’t work either unfortunately. Every style in the stylesheet has two entries like that; one for px and one for em. I am using the Twenty Twelve theme. I am totally perplexed. Three hours invested so far. So frustrating. This should be such a simple thing to do

Finally got it. The only way to do it is as custom CSS . Editing the theme stylesheet does nothing. Doesn’t make sense

one more question… how can I get WP to stop constraining my image header size