You can do several ways:
1. Packaging stores: Many stores and shopping centers in Mashhad sell packing boxes. These stores usually offer different types of cartons with different dimensions and qualities. 2. Online shopping: Store websites and online markets are also good options for buying furniture boxes. You can access the reliable sites by searching for the term "Mashhad furniture carton". 3. Shipping companies: Some shipping companies also offer carton sales and packaging services. These companies usually supply quality cartons suitable for carrying furniture. 4. Social groups: You can ask others in local groups and social networks to get more updated information about cardboard sellers in Mashhad.