The Priority Mail Flat Rate depends on what you're sending.
| Package Type8 | Shipping Price |
|---|---|
| Flat Rate Envelope | $5.95 commercial base $6.65 Post Office (retail & online) |
| Gift Card Flat Rate Envelope | $5.95 commercial base $6.65 at Post Office (retail & online) |
| Window Flat Rate Envelope | $5.95 commercial base $6.65 at Post Office (retail & online) |
| Small Flat Rate Envelope | $5.95 commercial base $6.65 at Post Office (retail & online) |
| Padded Flat Rate Envelope | $6.50 commercial base $7.20 at Post Office (retail & online) |
| Legal Flat Rate Envelope | $6.25 commercial base $6.95 at Post Office (retail & online) |
| Small Flat Rate Box | $6.45 commercial base $7.15 at Post Office (retail & online) |
| Medium Flat Rate Box – 1 (top-loading) | $12.40 commercial base $13.60 at Post Office (retail & online) |
| Medium Flat Rate Box – 2 (side-loading) | $12.40 commercial base $13.60 at Post Office (retail & online) |
| Large Flat Rate Box | $17.05 commercial base $18.85 at Post Office (retail & online) |
| APO/FPO/DPO Flat Rate Box | $15.55 commercial base $17.35 at Post Office (retail & online) |
| Large Flat Rate Board Game Box | $17.05 commercial base $18.85 at Post Office (retail & online) |
| Prepaid Forever® Priority Mail Flat Rate® Packaging | From $6.65 at Post Office (retail & online) |
USPS Priority Mail Express items will be delivered in a tracked and insured package that looks like this: 
USPS Priority Mail items are delivered in an envelope that looks like this: 
Here's how SendOvernightMail.com works:
