Rare Post Boxes

USPS Priority Mail Flat Rate boxes are an easy-to-use, cost-effective shipping option. You can easily ship like the experts; just know the USPS Flat Rate box sizes, prices, and how it works before you buy.

Other examples of historic letter boxes on Gibraltar include a rare George V lamp box. This collection helps to give Gibraltar a nostalgic feel for many British visitors. ← New Year Greetings Chinese Classics →. 'A number of unusual post boxes are to be found in Dorset. Located in the east of the county are three pillar-boxes cast during the short reign of Edward VIII, one in Highcliffe and two within a mile of each other in Parkstone, Poole. Only 161 such boxes were ever made and about 150 survive nationwide.' A Virginia man suffered a rare reaction to a COVID-19 vaccine that caused a painful rash to spread across his entire body and skin to peel off, doctors said. Richard Terrell, 74, of Goochland began. Ayr Ayrshire, Scotland, UK 05 Oct 2020: The Edward VIII pillar post box in Ayr is a rare sub-type of an otherwise common and prolific type of street furniture. Edward VIII reigned for less than a year and the number of post boxes created during his reign was therefore correspondingly small when compared to other monarchs. Feb 26, 2011 There is even a very rare Don Post Studio 3 pice shipping box in this lot. It has written by hand that it contains 3 pices of 2009 wich are the order number of Klaatu masks. This has been crosed out and on top of the box is writen that it cantains Admiral Ackbar Klaatu and Gamorrean Guard I still have the Admiral Ackbar and Klaatu masks.

How Does USPS Flat Rate Shipping Work?

The USPS Priority Mail Flat Rate service will ship your package anywhere in the U.S. in 1-3 business days for a flat fee. To ship with this service, follow these easy steps:

  1. Order free Flat Rate boxes from the USPS. You have to use the branded Flat Rate boxes to get the Flat Rate shipping price, and you can order them online or pick them up at your local Post Office.
  2. Sign up for a free Shippo account to access the best rates on USPS Flat Rate shipping and print your labels from the comfort of your office or home.
  3. Bonus! Determine if a USPS Flat Rate box is the cheapest option for the items you’re looking to ship, since it’s not always the most affordable choice.

What are the 2021 USPS Flat Rate Box Sizes and Prices?

As you’ll see below, Shippo offers discounted shipping rates when compared to what you’d find at your local Post Office. No volume or coding requirements. To sign up for a free Shippo account, visit www.goshippo.com/register/.

2021 USPS Priority Mail Flat Rate
Shippo vs. Retail Rates
ProductsDimensionsShippo Rate Retail RateSavings Using Shippo vs. Retail

% Savings with Shippo

Flat Rate Envelope12 ½” x 9 ½”$7.40$7.95$0.557%
Legal Flat Rate Envelope15” x 9 ½”$7.70$8.25$0.557%
Padded Flat Rate Envelope12 ½” x 9 ½”$8.00$8.55$0.556.5%
Small Flat Rate BoxOutside:

8 11/16” x 5 7/16” x 1 ¾”

8 ⅝” x 5 ⅜” x 1 ⅝”

Medium Flat Rate Box – 1 (Top-Loading)Outside:

11 ¼” x 8 ¾” x 6”

11” x 8 ½” x 5 ½”

Medium Flat Rate Box – 2 (Side-Loading) Outside:

14” x 12” x 3 ½”

13 ⅝” x 11 ⅞” x 3 ⅜”

Large Flat Rate BoxesOutside:

12 ¼” x 12 ¼” x 6”

12” x 12” x 5 ½”


Is Priority Mail the Same as Flat Rate?

USPS Priority Mail is one of the most-popular service levels the Postal Service offers, and for good reason. It’s cost effective and encompasses three widely-used shipping options: Priority Mail Flat Rate (which we discuss above), Priority Mail weight-based, and Priority Mail Cubic.

To ship via Flat Rate, you need to use the Flat Rate branded boxes. To use Cubic and weight-based options, you will need to use your own packaging or USPS Priority Mail boxes.

Which is Cheaper: Flat Rate or Priority Mail?

Generally speaking, the USPS Flat Rate boxes are a great option for heavy items that are traveling long distances. We ran the numbers to find out exactly when you should use a Flat Rate box and when you should use your own packaging and ship via USPS Priority Mail weight-based or Cubic instead.

When to Use USPS Flat Rate Envelopes

  • USPS Flat Rate Envelopes are almost ALWAYS the cheapest option.
  • However, use your own envelope for packages weighing exactly 1 lb. and traveling locally.
  • And if your package weighs less than 1 lb., use your own envelope and ship via USPS First-Class Package Service.

Use your own envelope (NOT a Flat Rate envelope) for the following scenarios:

Flat Rate Envelope (12 1/2″ x 9 1/2″) – $7.40
Qualifications for Using Own PackagingCost to ShipSavings
Weighs 0.5-1 lb. and traveling less than 50 miles (Zone 0,1,2)$7.16$0.24
Legal Flat Rate Envelope (15″ x 9 1/2″) – $7.70
Qualifications for Using Own PackagingCost to ShipSavings
Weighs 0.5-1 lb. and traveling less than 600 miles (Zone 0-4)$7.16 – $7.67Up To $0.54
Padded Flat Rate Envelope (12 1/2″ x 9 1/2″) – $8.00
Qualifications for Using Own PackagingCost to ShipSavings
Weighs 0.5-1 lb. and traveling less than 600 miles (Zone 0-5)$7.16 – $7.88Up to $0.84
Weighs 2 lbs. and traveling less than 50 miles (Zone 0,1,2)$7.79$0.21

When to Use USPS Flat Rate Boxes

  • For 1 – 20 lb. packages, choose Flat Rate for long distances and your own box for short distances.
  • For <1 lb. packages, use your own box and ship via USPS First-Class Package Service.
  • For >20 lb. packages, use a Flat Rate box.

Use your own box (NOT a Flat Rate box) for the following scenarios:

Sm. Flat Rate Box (8 5/8″ x 5 3/8″ x 1 5/8″) – $7.90
Qualifications for Using Own PackagingCost to ShipSavings
Weighs 0.5-20 lbs. and traveling less than 600 miles (Zone 0-4)$7.16 – $7.81Up to $0.74
Med. Flat Rate Box (11 1/4″ x 8 3/4″ x 6″) – $13.75
Qualifications for Using Own PackagingCost to ShipSavings
Weighs 0.5-2 lbs. and traveling anywhere except U.S. Territories (Zone 0-8)$7.16 – $11.69Up to $6.59
Weighs 3-20 lbs. and traveling less than 1400 miles (Zone 0-6)$8.00 – $13.58Up to $5.75
Lg. Flat Rate Box (12 1/4″ x 12 1/4″ x 6″) – $19.30
Qualifications for Using Own PackagingCost to ShipSavings
Weighs 0.5-1 lb. and traveling to any U.S. State including Hawaii and Alaska$7.16 – $11.69Up to $12.14
Weighs 2-4 lbs. and traveling anywhere except U.S. Territories (Zone 0-8)$7.79 – $18.96Up to $11.51
Weighs 5-20 lbs. and traveling less than 1800 miles (Zone 0-7)$8.20 – $18.08Up to $11.10

Keep in mind that the maximum weight is 70 pounds. And, when sealing a Flat Rate envelope or box, the container flaps must be able to close within the normal folds.

Is Priority Mail (Weight-based) or Flat Rate Faster?

Technically speaking, they are all part of the Priority Mail mail stream, so they all ship within 1-3 business days.

Are There Any Other Restrictions?

There are specific regulations and standards for mailing restricted, prohibited, and hazardous materials, including cigarettes and smokeless tobacco. You also can’t ship airbags, ammunition, explosives, or gasoline. For more details, visit the USPS Shipping Restrictions page.

How Do I Get a USPS Priority Mail Flat Rate Label?

It takes just a few minutes to set up a free Shippo account, and then you can print the label from your office or warehouse. (To get a clearer picture upfront of how you can save on USPS shipping rates by using Shippo, feel free to check out our USPS shipping calculator.) Affix the label to the USPS Priority Mail Flat Rate box. Then, put it in your mailbox or schedule a pick-up with your local mail carrier in the Shippo dashboard.

Make sure the label you’re using matches the packaging. For example, if you are using a Priority Mail Express Flat Rate box, you need to use a Priority Mail Express Flat Rate label.

If you liked this post, you may also be interested in a video that our co-founder Laura Behrens Wu did with the co-founder of packaging solution company Lumi on shipping with the USPS.

Rare Post Boxes For Sale

Shippo is a multi-carrier API and web app that helps retailers, marketplaces, and platforms connect to a global network of carriers. Businesses use Shippo to get real-time rates, print labels, automate international paperwork, track packages and facilitate returns. Shippo provides the tools to help businesses succeed through e-commerce shipping.

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Lunch Boxes so Valuable You’d Never Trade Them for Your Buddy’s Twinkies

Remember the joy of finding just the right lunch box when you were a kid? It was so much more than a receptacle to carry your sandwich and snack cakes. It was an announcement to the world about who you were. It was a badge that declared, “I’m a Spider-Man kid,” or “The Care Bears are my thing!”

Those vintage lunch boxes are worth some ridiculous coin these days. How much? Well, here are a few of the most expensive out there that would set you back more than the cost of a couple of Happy Meals.

Lone Ranger ‘Red Band’

Maker: Adco Liberty

Year: 1955

Approximate Value: $1,250

Who didn’t love The Lone Ranger? “Hi-ho, Silver. And away!” The Lone Ranger was a wild west superhero, mask and all. This metal lunch box had a couple of versions. One had a blue band around the outside and the other a red band. The red-banded version has had a winning bid of $1,250 at a recent auction.

You’re mentally scanning your attic right now, aren’t you?

Star Trek

Maker: Aladdin

Year: 1968

Approximate Value: $1,500

This was the lunch box that would boldly take your lunch where no lunch had gone before. A classic, square lunch box, the Star Trek lunch box from Aladdin features a picture of the U.S.S. Enterprise on the front and some action images of Kirk, Spock and the rest of the crew on the other sides. In pristine condition, Trekkers can expect to fork over $1,500 or more for this one.

Set your bank account to “stun!”

The Beatles

Maker: Aladdin

Year: 1966

Approximate Value: $1,550

Of course, memorabilia of the Fab Four never goes out of style. The Beatles blue lunch box from 1966 features images of each band member’s head on the front. Along with the lunch box comes a thermos that shows the group playing its tunes. In mint condition, Beatlemania fans can plan on shelling out $1,550 or more. Apparently, they weren’t kidding when they sang, “Money (That’s What I Want).”

Knights in Armor

Maker: Universal

Year: 1959

Approximate Value: $1,750

The 1950s love them some knights in shining armor stories. “Knights of the Round Table,” “Ivanhoe,” and “Prince Valiant” were fan favorites.

This lunch box isn’t tied to any particular movie, TV show or comic. Instead, it’s just a no-name knight lunch box hoping to piggyback on the success of the genre. Apparently, it worked because this lunch box has sold as high as $1,750. That’ll put a kink in your chain mail!

Howdy Doody

Maker: Adco Liberty

Year: 1954

Approximate Value: $1,787.10

What kid didn’t love Howdy Doody back in the day? This lunch box features Howdy himself on the front and a bunch of his on-air buddies on the rest of the box. At an auction, this rare piece lassoed $1,787.10. Say, kids, what time is it? It’s time to go broke buying a lunch box. In 1954 the average cost of a new car was just a shade over $1,900. Ah, but the memories are priceless. Right?

The Munsters

Maker: King-Seely Thermos Co.

Year: 1965

Approximate Value: $2,050

Herman, Eddie, Grandpa and the rest made for a seriously entertaining TV family. As popular as the show was, it’s no easy feat to scare up this lunch box from 1965. To get top dollar one needs to have the accompanying thermos. In perfect shape, this one will put a bite on your wallet to the tune of $2,050 at auction.

Mickey Mouse & Donald Duck

Maker: Adco

Year: 1954

Approximate Value: $2,050

Rare Post Boxes Uk

You can’t get much more classic than Mickey and Donald. On one side of this vintage lunch box, you have Mickey, Pluto and Donald’s nephews: Huey, Dewey and Louie. On the other side, you have the duck himself having a picnic with his nephews. What do you put in such a classic lunch box? How about a “Hot dog, hot dog, hot diggity dog….”

Yellow Submarine

Maker: King Seeley Thermos Co.

Year: 1968

Approximate Value: $2,250

The Beatles can’t settle for just one hit. One of the most iconic songs from one of history’s most iconic bands has become (you guessed it) one of the most iconic lunch boxes ever. The lunch box depicts some of the artwork seen in the uber-groovy music video. However, at $2,250, this collector’s item could leave your finances a bit underwater.


Maker: Okay Industries

Year: 1971

Approximate Value: $2,296

The pooch who liked to bite crime in the butt also made for a pretty mean lunch box. From 1971, this box shows the floppy-eared crusader kicking some bad guys, just like on the TV show. Did you know that Underdog was originally just a General Mills character used to sell cereal? Apparently, he did way more than that because for a cool $2,296 you could take an Underdog lunch box to work tomorrow. That’s a lot of Lucky Charms!

Mickey Mouse

Maker: Geuder, Paeschke & Frey

Year: 1935

Approximate Value: $2,350

When is a lunch box not a lunch box? When it’s a lunch kit. This Mickey Mouse Lunch Kit could be the granddaddy of all modern lunch boxes. Sold in 1935 for just $.10-$.20 each, they were still a luxury that many couldn’t afford during the depression. According to the Smithsonian, this was the first lunch box produced featuring a character image. Though it may not be the most expensive lunch box out there, it could be the most honored. Ol’ Walt had a couple of good ideas, didn’t he?

The Jetsons

Maker: Aladdin

Year: 1963

Approximate Value: $2,650

One day you’re watching your guilty pleasure show, “Pawn Stars,” and you watch a lady come in with an awesome old lunch box. It’s not square. It’s the metal-type with the rounded top. On it, “The Jetsons” are proudly displayed, and this lady wants $700 for it. Due to some minor damage and the fact that she didn’t have the thermos, she only got $400. Now, in perfect condition, The Jetsons lunch box has rocketed up to $2,650 in mint condition.


Maker: King-Seeley Thermos Co


Year: 1963

Approximate Value: $3,200

If there was anything cooler than science fiction in the early 1960s, it was the reality of space travel. The Orbit lunch box from Thermos featured National Geographic images of the Mercury space capsule with John Glenn at the helm as well as a launch photo of the Atlas rocket launching from the space pad. Unfortunately, Thermos didn’t get National Geographic’s permission and had to stop making the lunch boxes. Oops. The Smithsonian Museum has one of these on display. One small step for kids, one giant leap for lunchtime.

Dudley Do-Right

Maker: Universal

Year: 1962

Approximate Value: $3,400

Who can forget the not-so-bright Canadian Mountie from the old Rocky and Bullwinkle cartoons? This lunch box, featuring the lovable hero, was perfect for taking your poutine to school and making your pals jealous. Now, you can sell it off for a cool $3,400 or better, and get yourself a whole lotta double-double at the Tim Hortons.

Man From Atlantis

Maker: King-Seeley Thermos

Year: 1977

Approximate Value: $5,201.91

Just when you realize these are all based on super popular television shows or pop culture icons, you come across this one. “Man From Atlantis” was a short-lived television phenomenon in 1977-78. Four made-for-TV movies led to a series, but the series only lasted one, 13-episode season.

Meanwhile, King-Seeley Thermos made these cool lunch boxes. They halted production faster than you can say “mermaids are real,” and there may only be three of these bad boys left. In 2013 someone put down a cool $5,201.91 on eBay to own one of them.


Maker: Aladdin

Year: 1978

Approximate Value: $5,222

Finding one of these lunch boxes is almost as rare as finding someone who remembers the TV show “240-Robert.” A cop show set in L.A., it only lasted a short time, and the run of lunch boxes made was small. One guy who worked at the production plant bought one and hung on to it. Because there are so few left, he apprehended a nifty $5,222 on an eBay auction.



Maker: King-Seeley Thermos

Year: 1957

Approximate Value: $6,287.50

Quick. Let’s play a game. There’s an extremely valuable lunch box from the 1950s and it features an elephant. Name that elephant! Dumbo? Don’t be silly. Babar? Nope. It’s Toppie, the Top Value Elephant!

Toppie was a character used by Kroger’s food stores as part of their value stamp program. Collect enough stamps and you could turn them in for cool stuff, like this classic lunch box. There may only be a dozen or so of these left in the world, which is why one sold on eBay for $6,287.50 a few years ago.


Maker: Universal Studios

Year: 1954

Approximate Value: $16,000

He’s the king of all superheroes, and this lunch box with his image is arguably the most super of all of these super lunch boxes. This Superman lunch box could be the most desired collectible lunch box out there. It has reportedly sold for as much as $16,000 in the past. You’d think if you could afford to pony up that kind of cash, you wouldn’t need to pack your own lunch.