Here are some ideas on what to do with an old wedding dress:

1. Sell it: You can sell your wedding dress online on websites like Craigslist, eBay, or local swap shops. You can also sell it to consignment shops or bridal boutiques that specialize in pre-owned wedding dresses.

2. Donate it: You can donate your wedding dress to a charity or non-profit organization that helps brides in need. This is a great way to give back and help someone who may not be able to afford a wedding dress.

3. Repurpose it: You can repurpose your wedding dress into something new and useful. For example, you can turn it into a christening gown for your child, godchild, or family member. You can also turn it into stylish accessories like scarves, shawls, or bags.

4. Upcycle it: You can upcycle your wedding dress by transforming it into something new and fashionable. For example, you can turn it into a cocktail dress, a table runner, or a Christmas tree skirt.

5. Gift it: You can gift your wedding dress to someone who may appreciate it. For example, you can give it to a family member or friend who is getting married and may not be able to afford a wedding dress.

6. Compost it: If your wedding dress is made of natural fibers like silk or cotton, you can compost it. However, you need to remove any synthetic materials like zippers or buttons before composting.

7. Preserve it: You can preserve your wedding dress by storing it properly. You can use acid-free tissue paper or a preservation box to protect it from dust, light, and moisture.

8. Trash it: If you dont want to keep your wedding dress or donate it, you can trash it. However, this is not an eco-friendly option and may not be the best way to dispose of a sentimental item.

Overall, there are many ways to repurpose, donate, or sell an old wedding dress. You can choose the option that works best for you based on your personal preferences and values.