When choosing an empty eyeshadow palette powder box, there are several factors you should consider:

1. Size: Choose a size that fits your needs. Consider the number of eyeshadows you want to store in the palette and the size of each eyeshadow pan.

2. Shape: There are different shapes of eyeshadow palettes available, including square, rectangular, and circular. Choose a shape that fits your preference and storage needs.

3. Material: Eyeshadow palettes can be made from various materials, including plastic, metal, and cardboard. Choose a material that is durable and suitable for your usage.
   

4. Number of wells: The number of wells in the palette will determine how many eyeshadows you can store. Consider the number of eyeshadows you want to store and choose a palette with the appropriate number of wells.

5. Quality: Look for a high-quality eyeshadow palette that is well-made and sturdy. Check customer reviews and ratings to ensure the product has a good reputation.

6. Design: Consider the design of the eyeshadow palette. Look for a palette with a design that fits your personal style and aesthetic.

7. Price: Compare prices of different models and choose one that fits your budget.

Overall, when choosing an empty eyeshadow palette powder box, it is important to consider the size, shape, material, number of wells, quality, design, and price. By taking these factors into account, you can select an eyeshadow palette that is suitable for your needs and provides reliable performance.