The plastic serving trays and stands designed for desserts. Here's a detailed description:

1. **Three-Tiered Stands**:
- **Four stands** (two square and two round).
- These stands have three levels, allowing convenient placement of cupcakes, pastries, or other baked goods on different tiers.

2. **Two-Tiered Stands**:
- **Two stands** (one square and one round).
- These stands have two levels for serving baked goods or desserts.

3. **Flat Trays**:
- **Four trays**, each rectangular in shape.
- These trays can be used for displaying donuts, cookies, mini-cakes, and other desserts.

All these stands and trays are made of plastic, making them lightweight and easy to transport. They are ideal for serving at parties, buffets, gatherings, or other events where you need to display desserts and baked goods attractively and conveniently.