Chartjs-Chart.js responsive css size

var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
        datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3],
            backgroundColor: [
                'rgba(255, 99, 132, 0.2)',
                'rgba(54, 162, 235, 0.2)',
                'rgba(255, 206, 86, 0.2)',
                'rgba(75, 192, 192, 0.2)',
                'rgba(153, 102, 255, 0.2)',
                'rgba(255, 159, 64, 0.2)'
            ],
            borderColor: [
                'rgba(255, 99, 132, 1)',
                'rgba(54, 162, 235, 1)',
                'rgba(255, 206, 86, 1)',
                'rgba(75, 192, 192, 1)',
                'rgba(153, 102, 255, 1)',
                'rgba(255, 159, 64, 1)'
            ],
            borderWidth: 1
        }]
    },
    options: {
      responsive:true,
      maintainAspectRatio:false,
        scales: {
            y: {
                beginAtZero: true
            }
        }
    }
});

.overflow-auto-size{
  width:400px;
  heigth:50px;
  overflow:auto;
}
.big{
  width:1000px;
  heigth:50px;
}

<script src="https://cdn.jsdelivr.net/npm/chart.js@3.4.1/dist/chart.min.js"></script>
<div class="overflow-auto-size">
    <div class="big">
        <canvas id="myChart"></canvas>
    </div>
</div>