What matters
WordPress Featured Image dimensions at a glance
WordPress featured images at 1200×628 work across most themes and double as the Open Graph image for social sharing. This ratio matches Facebook and LinkedIn link preview specs.
Featured images appear on archive pages, in related posts, and as social media previews when the article is shared. Getting this right covers multiple bases at once.
Wrong-sized images get auto-cropped by the theme, often cutting off key elements. Missing featured images create blank spots in archive layouts.