Each pack comes with an equal amount of the 4 balloons in the image (White, Light Green, Mid-Green, Dark Green Dinosaur imaged-latex).  All balloons are 12" balloons.  Packs available in 8,12,16 and 20.  Standard delivery is free 2nd class Royal Mail.  Will be sent within 1 working day.  Normally arrive 2-4 working days after dispatch.  You can upgrade to 1st class at checkout for just £1.50.  1st class Royal Mail usually arrives 1-2 days after dispatch.