To find wholesale felt keyrings that can be delivered worldwide and offer customization options such as size and color, consider the following steps:

1. Online Wholesale Platforms: Look for wholesale platforms that specialize in handmade or artisanal goods. Websites like Alibaba, Etsy Wholesale, or Fair Trade Federation might have suppliers who offer felt keyrings with worldwide shipping and customization options.
2. Fair Trade Organizations: Many fair trade organizations work directly with artisans in Nepal and other countries to produce handmade goods. These organizations often have online wholesale catalogs where you can find felt keyrings and other products with customization options.
3. Direct Contact with Artisan Groups: Reach out directly to artisan groups or cooperatives in Nepal that specialize in felt products. Many of these groups are open to wholesale orders and may be able to accommodate custom requests for size and color. You can inquire about their international shipping options and minimum order quantities.
4. Trade Shows and Exhibitions: Attend trade shows or exhibitions that feature handmade or fair trade products. These events often have a wide range of suppliers from around the world, and you may be able to find felt keyring manufacturers who offer customization and international shipping.
5. Local Importers or Distributors: Look for importers or distributors in your own country who specialize in fair trade or handmade products. They may have existing relationships with artisan groups in Nepal and can help facilitate wholesale orders with customization options.

When contacting suppliers or artisans, be sure to specify your requirements for customization, including size, color, and any other details you need. Additionally, inquire about pricing, minimum order quantities, and shipping costs for international delivery. Building a good relationship with the supplier can lead to long-term partnerships and ensure the quality and reliability of your wholesale orders.