Domestic Shipping Services :
1. First Class Mail Parcel
2. First Class Mail Postcards
3. First Class Mail Letter
4. First Class Mail Metered Letter
5. First Class Mail Large Envelope
6. First-Class Package Service
7. Priority Mail Express 1-Day™
8. Priority Mail Express 1-Day™ Flat Rate Envelope
9. Priority Mail Express 1-Day™ Legal Flat Rate Envelope
10. Priority Mail Express 1-Day™ Legal Flat Rate Envelope Hold For Pickup
11. Priority Mail Express 1-Day™ Padded Flat Rate Envelope Hold For Pickup
12. Priority Mail 2-Day™ Small Flat Rate Box
13. Priority Mail 2-Day™ Legal Flat Rate Envelope
14. Priority Mail 2-Day™ Padded Flat Rate Envelope
15. Priority Mail 2-Day™ Small Flat Rate Envelope
16. Priority Mail 2-Day™ Window Flat Rate Envelope
17. Media Mail Parcel
18. Library Mail Parcel
International Shipping Services :
1. USPS GXG™ Envelopes
2. Priority Mail Express International™ Flat Rate Envelope
3. Priority Mail International® Large Flat Rate Box
4. Priority Mail International® Medium Flat Rate Box
5. Priority Mail International® DVD Flat Rate priced box
6. Priority Mail International® Large Video Flat Rate priced box
7. Priority Mail International® Flat Rate Envelope
8. Priority Mail International® Padded Flat Rate Envelope
9. Priority Mail International® Gift Card Flat Rate Envelope
10. Priority Mail International® Window Flat Rate Envelope
11. First-Class Package International Service™