![HubSpot Email Banner Size Guide: Dimensions & Best Practices [2026]](https://i0.wp.com/bootstrapcreative.com/wp-bc/wp-content/uploads/2023/07/hubspot-email-header-size-bootstrap-creative.png?fit=300%2C157&ssl=1)
Last Updated: January 2026 | Guidelines for HubSpot & General Email Clients
Quick Specs: HubSpot Email Header Size (2026)
- ✅ Recommended Dimensions: 600px width × 200px height
- 📁 Max File Size: Under 1MB (aim for < 100KB for speed)
- 🖼️ Best Formats: JPG (photos) or PNG (logos/text)
- 📱 Mobile Safe Zone: Keep critical text centered (middle 400px)
Stuck with broken HubSpot layouts?
Stop fighting with code. Browse my Drag-and-Drop HubSpot Modules to build better emails and landing pages in seconds.
Stop fighting with code. Browse my Drag-and-Drop HubSpot Modules to build better emails and landing pages in seconds.
Standard Email Banner Sizes Reference Chart
While 600px is the industry standard width for email templates (including HubSpot, Mailchimp, and Constant Contact), the height can vary based on your design goals.
| Banner Type | Dimensions (Pixels) | Usage Note |
|---|---|---|
| Main Header | 600 × 200 | Standard for logos and brand intros. |
| Hero Image | 600 × 400 | Taller format for product shots or main announcements. |
| Footer Banner | 600 × 150 | Slimmer design for social links or disclaimers. |
| Signature Banner | 400 × 100 | Compact size to fit under personal sign-offs. |
3 Best Practices for High-Converting Banners
- 1. Design for “Dark Mode”: Many B2B users read emails in Dark Mode. Use transparent PNGs for logos so you don’t get a white “box” around your brand.
- 2. Mobile-First Font Sizes: If you embed text in your image, make it at least 24px size. If the text is too small, it will be unreadable when the image shrinks on an iPhone screen.
- 3. The “Alt Text” Backup: Outlook often blocks images by default. Always set your Alt Text to something descriptive (e.g., “Company Logo – 50% Off Sale”) so users know what they are missing.
Need a Custom HubSpot Email Template?
I build custom, brand-compliant HubSpot themes that look perfect in every inbox.
Email Banner Size by Platform (Comparison)
Most major Email Service Providers (ESPs) stick to the 600px width standard to ensure compatibility with Gmail and Outlook.
| Platform | Recommended Width | Notes |
|---|---|---|
| HubSpot | 600px – 650px | HubSpot templates often add padding, so 600px is safe. |
| Mailchimp | 600px | Strict standard for their builder. |
| ActiveCampaign | 600px | Automatically resizes larger images. |
| Klaviyo | 600px | Optimized for e-commerce product blocks. |
Conclusion
Getting the size right is step one. Step two is building a template that doesn’t break. If you need a ready-to-use HubSpot theme or specific modules to make your life easier, check out my HubSpot Add-ons shop.
