preorder item waiting periods generally take anywhere from 3 weeks to 8 weeks. the time frame depends on a variety of factors, for example: if the order was for a single design vs multiple designs (single design will arrive quicker), if the design is intricate or simple, the amount of colors a design has, if the design has additions other than regular enamel (such as glitter or screenprinted work), or if the design was ordered around Chinese holiday periods.
while we can always hope that no issues arise during production, the reality is that sometimes issues do happen and unfortunately this will lengthen the time it takes for a preorder to arrive. i always try to be as transparent as possible in the rare case that i have issues with the production of my product. if you are concerned about the status of a preorder item, feel free to shoot me an email and i will gladly let you know what is going on.