The requirements for custom brooches usually depend on the complexity of the design, the choice of materials, the manufacturing process, and the specific needs of the customer. Here are some common requirements:

1. ** Design ** : Provide specific design drawings or concepts, including shapes, dimensions, colors and any special elements. If needed, a professional designer can help refine the design.

2. ** Material ** : Select suitable metals (such as brass, stainless steel, iron, silver, etc.) and other materials that may be used (such as enamel, gems, plastics, etc.). Different materials can affect the cost and durability of the brooch.

3. ** Production process ** : Choose the right process according to the design and material, such as casting, stamping, engraving, electroplating, etc.

4. ** Surface treatment ** : Determine the surface treatment, such as polishing, matte, antique effect, etc., which will affect the appearance and texture of the brooch.

5. ** Quantity ** : The number of customizations will also affect the cost of a single brooch. Mass production usually reduces the unit price.

6. ** Budget ** : Define the budget scope so as to find a balance between cost and quality.

7. ** Time frame ** : Set the completion time and delivery date to ensure that production and logistics arrangements can meet the time requirements.

8. ** Additional features ** : Some brooches may have special functional requirements, such as magnetic back buckle, safety lock, etc., to increase the safety and convenience of wearing.

9. ** Certification and standards ** : For certain purposes, such as corporate identity or branding, brooches may also need to meet specific quality standards or obtain relevant certifications.

If you plan to customize your brooch, it is advisable to speak with a professional manufacturer or supplier who can provide more detailed guidance according to your specific requirements and help you achieve your ideal brooch design.