The U.S. Virgin Islands are a United States overseas possession comprised of the islands of Saint Thomas, Saint Croix, and Saint John. Mailpieces destined for any of those islands are subject to domestic postage rates, mail classification definitions, preparation requirements, weight and size limits, ZIP Code specifications, markings and endorsements, and other mailing conditions that are referenced in Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM).
The British Virgin Islands are a foreign destination comprised of the islands of Anegada, Tortola, Jost Van Dyke, Peter Island, and Virgin Gorda. Mailpieces destined for any of those islands are subject to international postage rates, mail classification definitions, preparation requirements, weight and size limits, addressing standards, customs form requirements, and other country specific conditions for mailing that are referenced in the International Mail Manual (IMM).
See Publication 141, Global Express Guaranteed Service Guide, for information about areas served in the destination country, allowable contents, packaging and labeling requirements, tracking and tracing, service standards, and other conditions for mailing.