But the most popular trick was wearing a control underwear.
The survey of 2,000 women found, that other tricks that women used included donning stilettos to add height and wearing big sunglasses to make their face seem smaller
Long tops to cover rolls of fat, big belts and high-waisted trousers are worn by many women so that they can make themselves appear slimmer.
The study, conducted by online retailer Marisota, found that 11 percent of women use excess make-up to draw attention away from their body.
More unconventional tricks were wearing a padded bra to give the illusion of a big bust and a small waist, constantly breathing in and trying to continually stand-up straight
Twenty seven percent women said that they bought dresses that are too small so they could say that they fitted in a certain size.
The tricks that women use to look thinner are:1. Wearing shape wear underwear2. Wearing black3. Long tops to cover tummy and bum4. Wearing high heels5. Breathing in6. Standing-up straighter7. Wearing a padded bra to make your boobs look bigger and waist look smaller8. Wearing a baggy top9. Wearing horizontal stripes to elongate your figure10. Not eating on the day of the event you want to look thin for11. Applying fake tan12. Wearing a big belt13. Wearing high-waisted jeans or trousers14. Standing in between people for photos15. Carrying a big handbag16. Wearing tights17. Hanging out with friends that are fatter than you18. Putting your hair up to make yourself appear taller19. Creating big hair to overshadow your figure20. Applying heavy make-up to draw attention to your face not body21. Wearing massive sunglasses to make your face seem smaller