JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<br/><!-- Just so that JSFiddle's Result label doesn't overlap the Chart -->
<div id="chartContainer"></div>

JavaScript

var chart = new CanvasJS.Chart("chartContainer", {
  title: {
    text: "Column Chart"
  },
  width: convertMillimeterToPixel(100), //Chart Width set to 100mm
  height: convertMillimeterToPixel(100), //Chart Height set to 100mm
  axisY: {
    includeZero: true,
    gridThickness: 0,
    suffix: 'mm',
    labelFormatter: function(e) {
      return Math.round(e.value / 3.7795);
    }
  },
  toolTip: {
    contentFormatter: function ( e ) {
      return (e.entries[0].dataPoint.y / 3.7795); 
    }  
  },
  data: [{
    showInLegend: true,
    legendText: "Scale: 1mm on Chart = 2mm in Real-World",
    dataPoints: [
      { x: 10, y: 71 },
      { x: 20, y: 55 },
      { x: 30, y: 50 },
      { x: 40, y: 65 },
      { x: 50, y: 95 },
      { x: 60, y: 68 },
      { x: 70, y: 28 },
      { x: 80, y: 34 },
      { x: 90, y: 14 }
    ]
  }]
});

/* Considering all y-values passed to be in millimeters & converting the same to pixels - as chart renders chart in pixels */
for (var i = 0; i < chart.options.data[0].dataPoints.length; i++) {
  var yValue = chart.options.data[0].dataPoints[i].y;
  chart.options.data[0].dataPoints[i].y = convertMillimeterToPixel(yValue);
}

chart.render();

function convertMillimeterToPixel(mm) {
  return (mm * 3.7795);
}