Images on my site aren’t sized the way they are in the demo

When changing to a new theme, you need to regenerate your thumbnails (featured images). You can do this by using the Regenerate Thumbnails plugin which is included in your theme’s recommended plugins.

• Install and activate the Regenerate Thumbnails plugin.
• From your dashboard, go to Tools > Regenerate Thumbnails.
• Click the Regenerate Thumbnails button.