USPS Rates: Mailing a Small Envelope from U.S. to China (2023)

USPS First-Class Package International Service (FCPIS) – for envelopes/flats up to 15.99 oz (453g):

Flat-Rate Envelope (any weight up to 1 lb):

• 1 oz: $1.30 (metered) / $1.40 (stamped)
• 2 oz: $2.15 / $2.28

Priority Mail Express International Flat-Rate Envelope: 6.5"×9.5" – $24.95 (3–5 business days, tracking, insurance up to $200).

Rates effective 2023; check usps.com for current prices. Customs form (CN22/CP72) required.