How to keep images for same height and width inside bootstrap 4.4.1 cards?

[Anonymous]

I am trying to use bootstrap cards with images inside. I need to keep all the cards to be in same size (same width and height). Images should also be the same height and width as well. I have tried several solutions found on net but not work in my case including “width” and “height” attribute in tag. Any solution would be a great help! Here is my code for cards

    <div class="col mt-4">

                    <div class="card">
                     
                        <a href="product-details.php?pid=<?php echo htmlentities($row['id']);?>">
                            <img  src="admin/productimages/<?php echo htmlentities($row['id']);?>/<?php echo htmlentities($row['productImage1']);?>" data-echo="admin/productimages/<?php echo htmlentities($row['id']);?>/<?php echo htmlentities($row['productImage1']);?>"   alt="" width="340" height="440"></a>
                    </div>
                </div>

 

[Anonymous]

Look at your output html (view source) and check that it is correct.

If it is correct, view the page in developer tools to see where it's going wrong.