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Soak the beret in warm water. If your beret has a flash, keep it away from the water as much as possible. Note: Using hot water on the black rim will shrink the beret. If your beret is slightly too large, using hot water is a good idea. If your beret already fits your head snugly, be sure to avoid hot water. Get rid of all the extra water you can by gently wringing out the beret. It will still be damp, but make sure there is no more dripping water. Place the damp beret on your head. Pull the beret up to make it stand. If your organization uses the standard beret shape discussed in Method 1, pull all excess fabric down on the right side of your head by folding it with your hands. Repeat this action several times, making sure the fabric on top is completely smooth. Doing this will keep the beret from shrinking too much and will form the beret more closely to the exact shape of your head. If necessary, you may need to hold the fold down with one hand until it becomes secure. You may take the beret off if it's still slightly damp after a few hours.

Summary:
Wet the beret. Wring out the excess water. Shape the beret. Allow the beret to dry on your head.