What size photos needed for Vietnam visa?

Dear  Suellen Gorman, 

Thanks for your concern,

.     Prepare 2 photos 4x6 cm (or same size passport photos) . If you don’t have photos, You can take photos at the airport when you arrive and it costs 5USD/person in HCM. ( or 2 USD/person in Hanoi).

Best Regards.

Stepfano Tran (Mr. )