Baloons Wall Stickers. 25 hot air baloon, butterfly and cloud stickers, largest baloon is 20cm high x 18cm wide. Pretty flower and dotty design to liven up your room. These wall stickers are best applied to smooth surfaces. If applying to a coarse or structured surface please test first by using part of the remnant material around the stickers to avoid losing a sticker. Please ensure that all walls are clean, dry and free of any dust and grease. If walls have been recently painted or wall papered, leave at least 30 days before application. In case of newly plastered walls leave at least 60 days before application. Do not use aggressive cleaning products to clean walls before or after application. Please note: We recommend that stickers are not applied nearor on a radiator. If the above instructions are not followed, stickers may not adhere to the surface or may fall off after a period of time.