[Solved]-Set fixed label size for grouped bar chart in angular Chartjs-Chart.js

Have you read Labelling Axes and Tick Configuration?

Changing the tick font size, changes the tick size, but also the amount of ticks. Here is a fiddle to show the effect: JSFiddle

scales: {
    xAxis: {
        type: 'time',
        ticks: {
            font: {
                size: 15,
                padding: 5,
            },
        },
    },
},