Product Style Classification：Classified by simple and practical style, suitable for different European and American use scenarios, the styles are simple and easy to screen: 1. Simple short wallet: Unisex, small and light, easy to carry, suitable for daily commuting, can be put into pockets and small bags, with built-in card slots and cash positions to meet basic use needs[1][5]; 2. Long wallet: Focus on large capacity, suitable for women or people who need to carry more cards and cash, can be put into handbags and commuting bags, with clear partitions, practical and convenient[5][10]; 3. Folding wallet (bi-fold/tri-fold): Classic style, suitable for men and women, small after folding, sufficient capacity when unfolded, balancing portability and practicality, and it is a popular style in the European and American markets[1][5][9]; 4. Simple card holder: Minimalist design, focusing on storing cards, small and light, suitable for daily light travel and people who don't like to carry too many items[1][5]; 5. Zipper wallet: Zipper closure, safe and anti-loss, can store cards, cash and change, waterproof and dirt-resistant, suitable for outdoor travel, daily leisure and other scenarios[1][5].