Email Signature Size: Width, Height & File Limits

Keep your email signature within size limits so it loads fast and renders correctly.

Oversized signatures slow email load and get clipped in mobile clients. Stay under 600 px wide and keep total HTML + images lean.

Recommended limits

Use ProSignature templates in the generator — layouts are pre-optimized for email clients.

A complete step-by-step guide to creating a professional email signature that works in every major email client.

Nine professional email signature examples — minimal, corporate, creative — ready to customize and export.

Add a professional HTML email signature to Gmail on desktop and mobile without breaking layout or images.

Start using our free AI-powered email signature generator and create a professional signature in minutes.