How Many Stamps for a Manila Envelope: A 5×7 or 6×9 manila envelope under one ounce needs one Forever stamp ($0.78). A 9×12 manila envelope is different. It mails at the large-envelope (flat) rate, which starts at $1.63 for the first ounce. Two Forever stamps ($1.56) fall about 7 cents short of that, so buy exact large-envelope postage or add a makeup stamp. Postage depends on size and weight, and rates rise again on July 12, 2026.
What is a manila envelope?
A manila envelope is a tan-colored envelope used to send mail and carry documents without folding them. Offices across America use them every day.
The envelope gets its name from Manila hemp, the tough fiber it was first made from. That fiber comes from a banana species native to the Philippines.
When should you use a manila envelope?
Use a manila envelope to mail documents that should not be folded, such as contracts and other professional paperwork.
It also protects photos. A crease can ruin a photo or make a contract line or signature unreadable, so flat mailing keeps the contents intact.
How many stamps does a manila envelope need?
Manila envelopes come in three standard sizes:
- 5 x 7 inches (small)
- 6 x 9 inches (medium)
- 9 x 12 inches (large)
Other sizes exist, but these three cover most mail.
Note: A standard letter envelope is about 4.125″ x 9.5″ or 3.875″ x 8.875″.
The size and weight of the envelope decide the postage. Small and medium manila envelopes can mail as letters. The 9×12 size jumps to a higher rate class.
How many stamps for a small or medium manila envelope?
A 5×7 or 6×9 manila envelope mails as a standard letter if it weighs one ounce or less. That needs one Forever stamp ($0.78), as long as it stays flat and bends easily.
For each ounce over the first, add postage. You can add a second Forever stamp, but an “additional ounce” stamp ($0.29) costs less and covers the extra weight.
How many stamps for a large (9×12) manila envelope?
A 9×12 manila envelope falls into the “large envelope” or “flat” rate, not the letter rate. Postage starts at $1.63 for the first ounce.
Two Forever stamps equal $1.56, which is about 7 cents short of $1.63. To cover a 9×12 flat, you have two clean options:
- Buy exact large-envelope postage at the post office or online. This is the simplest fix and avoids overpaying.
- Use Forever stamps plus makeup postage. Two Forever stamps plus one “additional ounce” stamp ($0.29) gives you $1.85, which covers the first ounce with room to spare. Three Forever stamps ($2.34) also work but waste postage.
Underpaying gets the envelope returned for more postage, so weigh it and pay the flat rate.
How much does it cost to mail a manila envelope?
Small and medium manila envelopes (letter rate)
A small or medium manila envelope mails at the letter rate: $0.78 for the first ounce. Add $0.29 for each ounce over one.
Large 9×12 manila envelopes (flat rate)
Large manila envelopes cost more because they take up more space and weigh more. Here are the current flat rates by weight:
- 1 ounce: $1.63
- 2 ounces: $1.90
- 3 ounces: $2.17
- 4 ounces: $2.44
- 5 ounces: $2.72
Each ounce over the first adds about $0.27. A rigid, lumpy, or uneven envelope adds a nonmachinable surcharge of $0.49, because it can’t run through the sorting machines.
Weight-to-postage and stamps-needed guide
This table shows the flat rate for a 9×12 manila envelope and one simple way to cover it with Forever ($0.78) and additional-ounce ($0.29) stamps. Buying exact postage is always cheaper than rounding up with stamps.
| Weight | Flat rate | Stamps that cover it |
|---|---|---|
| 1 oz | $1.63 | 2 Forever + 1 additional-ounce ($1.85) |
| 2 oz | $1.90 | 2 Forever + 2 additional-ounce ($2.14) |
| 3 oz | $2.17 | 3 Forever ($2.34) |
| 4 oz | $2.44 | 3 Forever + 1 additional-ounce ($2.63) |
| 5 oz | $2.72 | 3 Forever + 2 additional-ounce ($2.92) |
Heads-up: A large envelope can weigh up to 13 ounces at the flat rate. Over 13 ounces, it must ship as Priority Mail or another package service, which is priced differently.
Rates rise July 12, 2026. The Forever stamp goes from $0.78 to $0.82, and other First-Class prices climb too. Forever stamps you already own stay valid at the new rate, so they don’t lose value.
What are the types of stamps?
1. Standard (denominated) stamps
These cover the exact amount printed on them. If postage rises, they no longer cover a full letter, so you add more stamps to make up the difference. Ask your post office for stamps in specific amounts.
2. Forever stamp
The Forever stamp is the one you’ll see most. It always covers a one-ounce letter (or a one-ounce small or medium manila envelope), even after rates go up.
Forever stamps work only for mail inside the United States. The USPS launched them in 2007, and they’re not tied to a fixed price. If you bought one for $0.55, it’s now worth the current $0.78 rate.
3. Additional-ounce Forever stamp
Use this for each ounce over the first instead of a second full stamp. It costs $0.29 and saves money on heavier mail.
4. Global Forever stamp
These work like Forever stamps but mail a one-ounce letter anywhere in the world. They cost more, so they’re worth it only if you mail abroad often.
Can you use standard stamps on manila envelopes?
Yes. You can use denominated standard stamps on manila envelopes, as long as they add up to the correct postage.
Do stamps expire?
Stamps never expire. Even stamps from the 1800s are still valid (though check an old stamp’s collector value before mailing it).
Postage costs rise over time, so an old denominated stamp may need extra postage added to cover today’s rate. Forever stamps don’t have this problem.
Can you use a damaged stamp?
It depends on how much of the stamp is intact. The post office decides at its discretion.
As a rule, a stamp works if more than half of it survives. A small tear or smudge won’t cause trouble.
Can you reuse stamps?
No. The post office cancels each stamp when it’s used, which marks it so it can’t be used again.
Where can you buy stamps?
Here are the main places to buy stamps.
1. Online
The U.S. Postal Service sells its full stamp collection online, in any quantity you need. You can also buy envelopes and other shipping supplies there.
You can buy stamps from Amazon, which also sells envelopes and mailing supplies. Other retailers like Stamps.com let you buy and print postage from home.
2. Retail stores
If you need a stamp fast, a retail store is your quickest option. These stores usually carry them:
- Walmart
- Walgreens
- Costco
- Kroger
- Meijer
- CVS
- Staples
- Rite Aid
- 7-Eleven
- Target (most locations)
Gas stations, grocery stores, and some banks and pharmacies often sell books of stamps too.
Most retailers sell stamps only in books of 20, not as singles. For one stamp, additional-ounce stamps, or Global Forever stamps, the post office is the better choice. You also can’t buy large-envelope flat postage at a corner store, so a 9×12 envelope usually means a trip to the post office or printing postage online.
3. Post office
You can buy stamps at your local post office or by phone at 1-800-STAMP-24.
The post office is your only choice for special postage amounts, additional-ounce stamps, and exact flat rates. Staff will weigh your envelope and tell you the right postage, which removes the guesswork for a 9×12 manila envelope.
How can you save money mailing manila envelopes?
If you mail manila envelopes often, these steps cut your postage costs.
1. Mail less when you can
Decide which messages truly need physical mail. Pay bills online or by phone instead of mailing them. For signatures, use an online e-signature tool if your industry accepts digital signatures. Some documents still need a physical signature, and a fax can work when you don’t need the original.
2. Buy a postage scale
A small scale removes the guesswork about your envelope’s weight. Guess low and the envelope comes back for more postage; guess high and you overpay. A scale gives you the exact weight every time, so you apply the right postage.
3. Use metered postage
Metered postage prints the exact amount needed based on size and weight, so you never overpay or slap on a spare stamp. It also looks more professional. You’ll need a postage meter or an online service that prints metered postage from your own printer.
4. Open a business mailing account
If mailing is part of your job, a business account with your carrier brings lower rates plus perks like tracking and online tools. Prices vary by carrier and volume.
How do you mail a manila envelope?
You can mail a manila envelope through the post office, UPS, or FedEx. For urgent or deadline mail, look at the express options below.
1. United States Postal Service
- First-Class Mail: 1 to 5 business days
- Priority Mail: 1 to 3 business days
- Priority Mail Express: next-day to 2-day, guaranteed by 6:00 p.m.
2. UPS
- UPS Ground: 1 to 5 business days
- UPS 3 Day Select: 3 business days
- UPS 2nd Day Air: 2 business days
- UPS 2nd Day Air A.M.: 2 business days, as early as 8:00 a.m.
- UPS Next Day Air Saver: next business day
- UPS Next Day Air: next business day by 10:30 a.m.
- UPS Next Day Air Early: next business day by 8:00 a.m.
3. FedEx
- FedEx Ground: 1 to 5 business days
- FedEx Express Saver: 1 to 3 business days
- FedEx 2Day: 2 business days
- FedEx 2Day A.M.: 2 business days by 10:30 a.m.
- FedEx Standard Overnight: overnight by the next evening
- FedEx Priority Overnight: overnight by the next afternoon
- FedEx First Overnight: overnight by the next morning
- FedEx SameDay: same day in select areas
FedEx and UPS offer more express options, but they cost more, and you can’t drop these off in your home mailbox.
What extra options can you add when mailing?
For important mail, these add-ons help make sure the envelope arrives.
1. Insurance
Most carriers sell insurance that pays you up to a set amount if the envelope is lost or damaged. Ask your carrier about coverage limits.
2. Proof of delivery
When you need proof a document reached someone, send it as certified mail or require a signature. You get peace of mind and a record that the recipient received it. A signature requirement can slow delivery if no one is home, so consider sending it to a workplace instead of a residence.
Frequently asked questions
How many stamps for a 9×12 manila envelope?
A 9×12 manila envelope mails at the flat rate, which starts at $1.63 for the first ounce. Two Forever stamps ($1.56) fall short, so add an additional-ounce stamp ($0.29) or buy exact large-envelope postage.
How many Forever stamps for a manila envelope under one ounce?
One Forever stamp ($0.78) covers a small or medium manila envelope (5×7 or 6×9) under one ounce. A 9×12 envelope needs flat-rate postage instead.
How much does it cost to mail a 9×12 envelope?
$1.63 for the first ounce, then about $0.27 for each additional ounce, up to 13 ounces. Over 13 ounces, it ships as Priority Mail.
Will my Forever stamps still work after the July 2026 price increase?
Yes. Forever stamps stay valid at the new $0.82 rate after July 12, 2026, no matter when you bought them.
What is the nonmachinable surcharge?
A $0.49 surcharge applies to rigid, lumpy, or uneven envelopes that can’t run through USPS sorting machines.
Can I put two stamps on a manila envelope?
Yes, but for a 9×12 flat, two Forever stamps come up about 7 cents short of the $1.63 rate. Add an additional-ounce stamp or buy exact postage so it isn’t returned.
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