1, the number
A large amount of Congyou, that is, what everyone said is small profits and losses.
2, the pattern
The pattern is simpler and cheaper, because the key patterns are all made by hand and have a greater impact on the price.
Generally speaking, the bigger the more expensive, but if the keychain is very small, it may increase the price of the product, because the product is too small and the pattern is difficult to do.