ServiceTransit TimeMax DimensionsMax Weight
First Class (Letters and Flats)1-3 days22" x 18" x 15" (55 cm x 45 cm x 38 cm)13 oz (368 g)
First Class Package Service1-3 days22" x 18" x 15" (55 cm x 45 cm x 38 cm)15.99 oz (453 g)
Priority2-3 daysCombined Length and Girth < 108" (274 cm)70 lbs (31 kg)
Express1-2 daysCombined Length and Girth < 108" (274 cm)70 lbs (31 kg)
Parcel Select2-8 business daysCombined Length and Girth < 130" (330 cm)70 lbs (31 kg)
Library Mail2-8 business daysCombined Length and Girth < 108" (274 cm)70 lbs (31 kg)
Media Mail2-8 business daysCombined Length and Girth < 108" (274 cm)70 lbs (31 kg)
First Class Package International7-21 daysCombined Length and Girth < 108" (274 cm)64 oz (1814 g)
Priority Mail International6-10 business daysCombined Length and Girth < 108" (274 cm)70 lbs (31 kg)
Express Mail International3-5 business daysCombined Length and Girth < 108" (274 cm)70 lbs (31 kg)
**Girth is 2 times (Width + Height).