Just following standard icon-only ion-button structure in toolbar, when looking at the icons in Android mode, they look smaller than same icons in iOS mode. It happens in browser, emulator and also on the devices.
Is that by design? can I do something about that?
Yes, it is the original design.
You can see the svg file already come with size different.
You can add platform prefix to make they look same.
As @sonicwong said it is the original design, Add custom css and change icon size
Thanks @sonicwong, I tried that too. It changes the shape but not the size!