Email Signature Design

Best Practices Guide

Size & Dimensions

Overall Dimensions

• Maximum width: 600-700px (recommended: 320-600px)
• Maximum height: 200-300px (recommended: 150-200px)
• File size: Keep under 1MB total (ideally under 500KB)
• Mobile consideration: Design should scale well to 320px width

Image Specifications

• Format: PNG or JPG (PNG preferred for logos with transparency)
• Resolution: 72 DPI (web standard)
• Logo size: Maximum 150px wide × 100px high
• Social icons: 16px × 16px to 24px × 24px

Typography & Fonts

Safe Web Fonts (Use these for maximum compatibility)

Serif:

• Georgia
• Times New Roman
• Times

Sans-Serif:

• Arial
• Helvetica
• Verdana
• Tahoma
• Trebuchet MS
• Geneva

Font Guidelines

• Primary text: 12-14px
• Name/Title: 14-16px (can be bold)
• Company name: 12-14px
• Contact details: 11-12px
• Legal disclaimers: 9-10px
• Line height: 1.2-1.4 for readability

⚠️ Avoid:

• Custom web fonts (Google Fonts, etc.)
• Decorative or script fonts
• Font sizes smaller than 9px

Design & Layout

Structure Best Practices

• Left-aligned layout works best across all clients
• Single column design preferred
• Clear hierarchy with proper spacing
• Consistent margins: 10-15px between sections

Color Guidelines

• Text color: Dark colors (#333333, #000000) for body text
• Links: Blue (#0066CC) or brand colors
• Backgrounds: White or very light colors
• Contrast ratio: Minimum 4.5:1 for accessibility

Visual Elements

• Separators: Use simple lines (1px solid) or spacing instead of complex graphics
• Icons: Use standard, recognizable symbols
• White space: Essential for readability and professional appearance