Please consider that the height should be structured same writing the article texts creatively so that the lines should be two or three. First 20 Words will be shown there and then the Read More Button will be placed. So you should use such 20 words for each article which will take same space for all. You can set the first row for 3 lines post and second row for 2 lines posts. The height is dynamic with different device width and height. You can set constant height for the boxes using the following code into the Innovation Options > General Options > Custom Code within Head Area Box
<style>.bqpcontainer .featured-box { min-height: 400px; text-align: justify; }</style>
