Change SVG size in Angular Material 2 <mat-icon> using vanilla CSS or HTML

I played with this for way too long.

I have a series of icons that I want to be scaled to fit in various mat-icon sizes, but each icon needs a different scale so they appear balanced with the other icons - effectively increasing the size of the viewBox.

In the end this worked well enough:

mat-icon
{
    width: 50px;
    height: 50px;

    display: flex;
    flex-shrink: 0;
    justify-content: center;

    outline: 1px dashed red;  // for testing    

    & ::ng-deep svg
    {
        align-self: center;
    }

    &.shrink-90 ::ng-deep svg
    {
        width: 90%;
        height: 90%;
    }

    &.shrink-80 ::ng-deep svg
    {
        width: 80%;
        height: 80%;
    }
}

Then I create the mat-icon with this, where iconCss='shrink-80'

   <mat-icon svgIcon="{{ feature.name }}" [ngClass]="feature.iconCss"></mat-icon>

The mat-icon itself can be scaled with whatever additional classes you want (just like you would for a normal icon). Then the 'shrinking' adjusts the size within the box.

It seems that library styles override your css inline declaration. Try maybe to add !important declaration to your style: style="font-size: 16 !important" or since you didn't provide more code, try to inspect this icon node, to check which style define the font-size.

Also check here

UPDATE:

Here is another possibly working solution. Add transform: scale(2); style for svg element you want to resize, where 2 is 200% of actual size (of course you can also downsize them using for example 0.5 value for 50%). Here is working sample for the website with your icons and link to documnetation:

.size-24 button svg {
    width: 24px;
    height: 24px;
    transform: scale(2);
}

In my application, with Material 7, I just changed the width and height of the "mat-icon" element in CSS (with !important, of course), and it worked for me like a charm.

For example:

mat-icon {
    width: 32px !important;
    height: 32px !important;
}