The gallery of intervals' pictures:

• 
  Perfect unison
• 
  Minor 2nd
• 
  Major 2nd
• 
  Minor 3rd
• 
  Major 3rd
• 
  Perfect 4th
• 
  Tritone
• 
  Perfect 5th
• 
  Minor 6th
• 
  Major 6th
• 
  Minor 7th
• 
  Major 7th
• 
  Perfect octave
• 
  Minor 9th
• 
  Major 9th
• 
  Minor 10th
• 
  Major 10th
• 
  Perfect 11th
• 
  Perfect 12th
• 
  Minor 13th
• 
  Major 13th
• 
  Minor 14th
• 
  Major 14th
• 
  Perfect 15th