What's your ideal handlebar width for XC riding?

For riders who are 5'7" – 5'10” / 169 – 178 cm

• 36 Less than 700mm
• 28 700mm
• 6 710mm
• 112 720mm
• 17 730mm
• 271 740mm
• 158 750mm
• 899 760mm
• 108 770mm
• 336 780mm
• 8 790mm
• 78 800mm
• 23 810mm
• 156 I don't know.