my solution for https://github.com/kenwheeler/slick/issues/179

equalHeightsSlickSlider.js

$.fn.equalHeightSlickSlider = function() {
	var
		$slider = $(this),
		$slides = $('.slick-slide', $slider),
		$slideitems = $('> div', $slides),
		slideCount = $slides.first().find('> div').length,
		slideHeight = 0
	;

	console.log(slideHeight);

	$slides.each(function(){
		slideHeight = Math.max($(this).outerHeight(), slideHeight); 
		slideCount = Math.max(slideCount, $(this).children().length);
	});

	$slideitems.height(slideHeight / slideCount);		

	return $(this);
}

var $slider = $('.slick-slider');

var equalizeSliderHeights = function(){

  var
  frequency = 250,
  	timeout = false
  	;

  return function() {
    if (timeout) {
      return;
    }

    timeout = setTimeout(function() {
      timeout = false;
    }, frequency);

    $slider.equalHeightSlickSlider();
  };
};

$(window).on('DOMContentLoaded load resize', equalizeSliderHeights());