What is the best image size for email newsletters in 2026?
The industry-standard email image width is 600 pixels, which is safe across all major email clients including Gmail, Outlook, Apple Mail, and Yahoo Mail. For a hero banner, 600×200 pixels at a 3:1 ratio works well. For body content images, 600×400 pixels is a solid choice. Keep individual images under 200 KB to avoid triggering spam filters and to ensure fast loading.