Fine feathers make fine birds (ไก่งามเพราะขน คนงามเพราะแต่ง) it means beautiful or expensive clothes may make the wearer seem more impressive than is really the case. This idiom is a good definition for fashion. People give meaning about different fashion clothes, shoes, accessories, and makeup. So it was not easy at the definition of the word "fashion" because it meant a wider than limit. Therefore fashion is something tangible and intangible causing joint flavor .So there will be a fashion must have the composition is acceptance in society is big or small , a model to copy, follow the group ,and occurs and fade away in a short period. Fashion is Social Psychology because the style of dress makes a decision and accept society and must be appreciated by many people interested in the same subject, and then it will be fashionable.