How do you ship your boxes? October 27, 2018 03:21 Updated In the US, most SinglesSwag boxes are shipped via the US Postal Service (USPS). International shipments are typically delivered by the destination country’s postal service. Related articles How long will it take for my box to arrive? How do I track my box? When will my box ship? How much does shipping cost? What do I do if my box is lost in transit?