If you're using Hotel Master theme, please read this : https://goodlayers.ticksy.com/article/12190/ 

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Blog Widget Equal Height - Modernize

Going to footer.php file.

at the bottom, try adding this right before the end of the body tag ( </body> ).

<script type="text/javascript">
jQuery(window).load(function(){
jQuery('.blog-item-holder').each(function(){
var max_height = 0;
jQuery(this).children('.blog-item0').each(function(){
if( jQuery(this).height() > max_height ) max_height = jQuery(this).height();
});
jQuery(this).children('.blog-item0').height(max_height);
});
});
</script>