<div class="container mt-3">
  <div class="row">
    <div class="col-12 col-md-6 mb-4 mb-md-0">
      <div class="card h-100">
         <img src="https://fakeimg.pl/100/" alt="...">
         <div class="card-body">
           <h5 class="card-title">Card title</h5>
           <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
         </div>
      </div>
    </div>
    <div class="col-12 col-md-6">
      <div class="card h-100">
        <img src="https://fakeimg.pl/100/" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">Some quick example text to</p>
        </div>
      </div>
    </div>
  </div>
</div>