Q: How to resize wordpress image to fixed height and auto width I have a WP slider with costum img sizes (fixed width and height) and i need that they would scale to fixed 330px height, and auto width. how to achieve this?
thank you in advance!

A: As this was specific wordpress question and I found an answed, i will share it. When you add custom image size to functions.php, add 9999 to width and hardCrop to false.
add_image_size('slider-thumb-alt', 9999, YOUR_FIXED_HEIGT, false);


A: First when importing them via the media manager you can define the native size. Otherwise you will have to hard code them like @Dan Grossman mentioned. We need more info. Site link and slider name?

A: <img src="http://www.example.com/image.jpg" height="330" />


A: It sounds like you already have a pretty decent idea of what you need. Use css to do this.
For example:
<img src="http://www.example.com/image.jpg" class="image_class"/>

<style>
.image_class{
width: auto;
height:330px;
</style>

You'll want to target based on class (rather than all images with img{...}). I haven't used  WP Slider, but I'm assuming that it will add a custom class to images in the slider. If so just use your in-browser developer tools, or view source, to see what class is being added to these images, then create the css like the above.
