Angular2 Material Dialog css, dialog size

There are two ways which we can use to change size of your MatDialog component in angular material

1) From Outside Component Which Call Dialog Component

import { MatDialog, MatDialogConfig, MatDialogRef } from '@angular/material';


dialogRef: MatDialogRef <any> ;

constructor(public dialog: MatDialog) { }

openDialog() {
        this.dialogRef = this.dialog.open(TestTemplateComponent, {
            height: '40%',
            width: '60%'
        });
        this.dialogRef.afterClosed().subscribe(result => {
            this.dialogRef = null;
        });
    }

2) From Inside Dialog Component. dynamically change its size

import { MatDialog, MatDialogConfig, MatDialogRef } from '@angular/material';

constructor(public dialogRef: MatDialogRef<any>) { }

 ngOnInit() {
        this.dialogRef.updateSize('80%', '80%');
    }

use updateSize() in any function in dialog component. it will change dialog size automatically.

for more information check this link https://material.angular.io/components/component/dialog