USPS Priority Mail shipping box and envelope

Priority Mail® is the cheapest way to ship small packages

With the best mix of fast delivery speed and low cost, Priority Mail® has four sub-services to maximize your savings when shipping with USPS®

Leafy plantPriority Mail shipping label printed by a Dymo 4XL printerWooden ruler

You can ship any box or envelope with Priority Mail®

Priority Mail Cubic softpack shipping labels and envelope

Priority Mail® is the shipping service that USPS® advertises the most, and you’ve probably seen the ads for Priority Mail Flat Rate® with the tagline, “If it fits, it ships.”

But because of those commercials, a common misunderstanding is that you have to use a special USPS®-branded box. It’s not true!

You can use any type of packaging to ship with Priority Mail® and it’s usually much cheaper than using a Flat Rate package.

Priority Mail postage

There are 4 different sub-services of USPS Priority Mail®

Tropical leaf

All Priority Mail® sub-services have the same standards, with delivery within 1-3 days, full package tracking, and $100 of insurance included for free.

Size-based Priority Mail Cubic®

A “secret” service that’s only available through the Commercial Plus Pricing® that Pirate Ship offers, Priority Mail Cubic® is the cheapest way to ship small packages, easily beating any other carrier. Learn more...

  • 📦

    Cheapest for small packages 1-20 lb

  • Delivery in 1 to 3 days

  • 📡

    Door-to-door tracking included

  • 💥

    $100 insurance included

  • 💵

    Save up to 89% by using Pirate Ship

Weight-based Priority Mail®

Is your package too big to qualify for Cubic rates? Bummer! But you can still get incredible shipping rates with weight-based Priority Mail®... just watch out for Balloon Pricing and Dimensional Weight Pricing! Learn more...

  • 📦

    Cheapest for larger packages

  • Delivery in 1 to 3 days

  • 📡

    Door-to-door tracking included

  • 💥

    $100 insurance included

  • 💵

    Save up to 41% by using Pirate Ship

Priority Mail Flat Rate®

Priority Mail Flat Rate Envelopes® and the Small Flat Rate Box® are incredible deals, but otherwise it's always cheaper to ditch the free packaging and use your own packaging instead of paying a premium. Learn more...

  • 📦

    Cheapest in only a few cases

  • Delivery in 1 to 3 days

  • 📡

    Door-to-door tracking included

  • 💥

    $100 insurance included

  • 💵

    Save up to 12% by using Pirate Ship

Priority Mail Regional Rate®

Priority Mail Regional Rate® boxes are never cheaper than Priority Mail Cubic®, with average costs that are significantly higher than it would be if you used your own similarly-sized packaging. Learn more...

  • 📦

    Never cheaper than Priority Mail Cubic®

  • Delivery in 1 to 3 days

  • 📡

    Door-to-door tracking included

  • 💥

    $100 insurance included

  • 💵

    Save up to 24% by using Pirate Ship

Get the cheapest Priority Mail® shipping rates available

Priority Mail labelsPriority Mail Small Flat Rate Box

USPS® offers three pricing tiers for Priority Mail®. Pirate Ship passes through the cheapest pricing tier available, USPS Commercial Plus Pricing® shipping rates, at their actual cost with no markup or fees, so you can save up to 89% compared to buying Priority Mail® shipping labels from the Post Office or other shipping software online.

Weight/Size
Up to, not over
0-150 miles
L, 1 & 2
150-300 miles
Zone 3
300-600 miles
Zone 4
600-1000 miles
Zone 5
1000-1400 miles
Zone 6
1400-1800 miles
Zone 7
1800+ miles
Zone 8
Territories
Zone 9
Flat Rate Envelopes
$6.35
$6.35
$6.35
$6.35
$6.35
$6.35
$6.35
$6.35
Legal Flat Rate Envelope
$6.65
$6.65
$6.65
$6.65
$6.65
$6.65
$6.65
$6.65
Padded Flat Rate Envelope
$6.90
$6.90
$6.90
$6.90
$6.90
$6.90
$6.90
$6.90
Small Flat Rate Box
$6.85
$6.85
$6.85
$6.85
$6.85
$6.85
$6.85
$6.85
Medium Flat Rate Box
$12.45
$12.45
$12.45
$12.45
$12.45
$12.45
$12.45
$12.45
Large Flat Rate Box
$17.10
$17.10
$17.10
$17.10
$17.10
$17.10
$17.10
$17.10
Regional Rate Box A
$7.10
$7.25
$7.40
$8.15
$9.47
$10.29
$10.80
$15.33
Regional Rate Box B
$7.41
$8.42
$9.37
$10.65
$16.15
$18.47
$21.03
$29.15
Cubic 0.1
$6.35
$6.79
$6.89
$6.98
$7.13
$7.28
$7.53
$9.72
Cubic 0.2
$6.80
$7.13
$7.20
$7.49
$7.88
$8.22
$8.46
$11.34
Cubic 0.3
$7.19
$7.36
$7.52
$8.23
$9.48
$10.26
$10.76
$15.19
Cubic 0.4
$7.31
$7.67
$8.29
$9.06
$11.53
$12.48
$14.17
$19.44
Cubic 0.5
$7.41
$8.08
$8.78
$10.17
$13.76
$15.39
$17.54
$24.07
1 lb
$6.35
$6.79
$6.89
$6.98
$7.13
$7.28
$7.53
$9.72
2 lb
$6.89
$7.03
$7.18
$7.91
$9.19
$9.98
$10.48
$14.87
3 lb
$6.98
$7.45
$8.22
$8.98
$11.80
$12.76
$14.88
$20.18
4 lb
$7.09
$7.81
$8.43
$10.03
$13.75
$15.59
$17.61
$24.30
5 lb
$7.19
$8.17
$9.09
$10.33
$15.67
$17.92
$20.40
$28.28
6 lb
$7.29
$7.29
$9.42
$13.77
$17.58
$20.42
$23.35
$32.40
7 lb
$7.80
$9.35
$9.74
$15.13
$19.47
$23.03
$26.23
$36.38
8 lb
$8.24
$9.63
$10.99
$16.84
$21.39
$25.35
$29.45
$40.85
9 lb
$8.46
$9.90
$11.07
$18.06
$23.27
$27.45
$32.74
$45.42
10 lb
$8.95
$10.18
$11.12
$19.51
$25.13
$30.19
$35.61
$49.39
11 lb
$10.46
$12.52
$13.42
$20.89
$26.98
$32.85
$38.57
$53.96
12 lb
$11.10
$13.32
$15.62
$22.37
$29.42
$35.52
$41.37
$57.86
13 lb
$11.68
$14.07
$16.35
$23.55
$31.58
$36.96
$42.84
$59.92
14 lb
$12.28
$14.85
$17.22
$24.94
$33.35
$39.01
$44.96
$62.89
15 lb
$12.76
$15.63
$18.06
$26.22
$34.64
$39.76
$46.14
$64.55
16 lb
$13.19
$16.46
$19.04
$27.52
$36.61
$42.00
$48.68
$68.10
17 lb
$13.61
$17.22
$19.95
$28.86
$38.46
$44.18
$51.26
$71.68
18 lb
$13.87
$17.75
$20.85
$30.16
$40.50
$46.36
$53.84
$75.31
19 lb
$14.20
$18.17
$21.32
$30.95
$42.31
$48.52
$56.39
$78.87
20 lb
$14.76
$18.45
$21.76
$31.52
$43.41
$50.33
$59.00
$82.51
21-70 lbs
To see all USPS® Priority Mail® rates, view or download the rate sheets below

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PineappleShipping a box with Priority Mail postage
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