There are some tried-and-true tricks that bear reminding for summer that will help you look slimmer for that bathing suit or special dress.

1. Wearing all one color from head to toe is the most slimming fashion tip you can take, because it creates a vertical view. Separate colors, especially for a top and pant/skirt outfit, cut the slimming flow.
2. Darker colors are more slimming than lighter ones.
3. Skip ankle straps on your shoes if you want your legs to look slimmer.
4. Shiny fabrics reflect light and make an area seem larger, and heavy textured fabrics add extra weight.
5. Wear clothes with vertical lines, ie pointed vs. rounded collars, and wear a long chain/bead necklace or scarf around the neck.
6. Avoid wearing clothes that are too tight. These only accentuate your weight. The same is true for too loose. Wear an exact fit for best results.
7. Stay away from big prints, ie florals. Smaller prints with lots of space between are safer.

Related links:
More tips to look slimmer
20 Tips for looking slimmer
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Secrets to looking Slimmer