Business Email Length: Subject Line and Body Best Practices
The length of a business email directly affects whether it gets read and acted upon. Too long, and recipients skim or defer it. Too short, and you may come across as curt or unclear.
Recommended Email Lengths
| Element | Recommended Length | Notes |
|---|---|---|
| Subject Line | 30–50 characters | Mobile displays ~35 characters |
| Preview Text | 40–90 characters | Shown after subject in inbox |
| Body (routine) | 50–125 words | Quick requests and updates |
| Body (detailed) | 125–300 words | Proposals and explanations |
| Signature | 3–5 lines | Name, title, contact info |
Subject Line Tips
- Front-load the most important information — mobile truncates after ~35 characters
- Be specific: "Q3 Budget Review — Action Needed by Friday" beats "Quick Question"
- Avoid all caps and excessive punctuation
Body Structure
Follow the "inverted pyramid" structure: lead with the action item or key message, then provide supporting details. Research suggests that emails between 50–125 words receive the highest response rates. For longer emails, use bullet points and bold key phrases to aid scanning.
Conclusion
Keep subject lines under 50 characters and email bodies under 300 words for optimal readability. Structure your message with the most important information first. Use Character Counter to check your email length before sending.