
First Class mail is generally delivered within 3-5 business days, depending on the destination.
If you're sending a letter or package to a nearby city or town, you can expect it to arrive in just a couple of days.
However, delivery times can vary significantly if you're sending to a rural area or across the country.
In these cases, it's not uncommon for delivery to take 5-7 business days or even longer.
Expand your knowledge: First Class Mail Delivery Time
What Is First Class Mail?
First Class Mail is the most common and affordable way to send envelopes and lightweight packages. It's perfect for sending bills, invoices, correspondences, and merchandise, as long as they weigh less than 3.5 ounces and 13 ounces respectively.
Many start-ups and home businesses use First-Class Mail to send postcards and letters. Unlike bulk-mailing services, there are no minimum number of pieces, mailing permits or presorting requirements to worry about.
First-Class Mail is the top tier of mailed materials, compared to second-class mail, third-class mail, and fourth-class mail. It's more expensive than standard mail, but it's faster and comes with extra features like returns and other services.
If you visit the USPS website, you'll find the following types of mail that must be sent through First-Class Mail or Priority Mail: Handwritten or typewritten materialBills, invoices and credit cardsPersonal correspondencePersonalized business correspondenceAny mailable item that is sealed or closed against inspection
The rate for First-Class Mail is decided based on the weight and size of the letter, package, or parcel. Any letter that weighs less than 3.5 ounces and any shipment that weighs less than 13 ounces are available to be sent in this class.
Discover more: How to Send Priority Mail from Home
Pricing and Discounts

First Class mail pricing is surprisingly straightforward. Mail delivered in 1–5 business days is available, which is a big plus for those who need to send packages quickly.
The pricing for this service is also quite simple. Our best-priced service for items up to 13 oz is available, making it a great option for those who want to save money without sacrificing speed.
Prices are based on shape and weight, which is a unique feature of First Class mail. This means that you'll pay a different price depending on the size and shape of your package, but it's still a great value overall.
Here's a quick rundown of the pricing options:
- One price for up to 3.5 ounces with commercially priced letters and cards
- Prices based on shape and weight
Features & Pricing
First-class mail prices are based on shape and weight, so it's essential to know the costs before sending a package.
The cost of a first-class mail stamp is $0.68 for a standard-size, rectangular envelope weighing up to 1 oz.

First-class mail stamps never expire, even if the postage rates go up.
For larger items, prices start at $0.53 for postcards and $1.39 for large envelopes.
If you're sending a package, you can add extra services like USPS tracking and signature confirmation, but these services are not available for postcards.
Here's a breakdown of the costs:
Commercial Pricing & Discounts
Commercial pricing is available for businesses that send a minimum of 500 presorted letters or flats.
You can get automation discounts on top of commercial pricing, making it a cost-effective option.
First-Class Mail commercial pricing offers a one price up to 3.5 ounces for presort and automation compatible letters and cards.
This rate is perfect for businesses that want to include promotional messages with bills, invoices, and statements.
The one price for up to 3.5 oz rate is not a blended rate and doesn't apply to First-Class Mail single-piece letters.
Charges for Irregular Pieces/Envelopes
Charges for irregular pieces/envelopes can be a bit tricky, but it's essential to understand how they're calculated.

For instance, a standard letter weighing 1 ounce costs $0.60 to mail.
However, if you're sending an envelope that's irregularly shaped, the postal service may charge you more based on its actual weight and size.
The first ounce of an irregularly shaped envelope costs $1.20.
You can also expect to pay extra for any additional ounces, which cost $0.20 each.
For example, if your irregularly shaped envelope weighs 2 ounces, you'll pay $1.20 for the first ounce and $0.40 for the additional ounce, making the total cost $1.60.
Size and Weight Restrictions
Size and weight restrictions for First-Class Mail are pretty straightforward.
First-Class Mail Postcards must be a minimum size of 3½ x 5 inches and a maximum size of 4¼ x 6 inches, with an allowed thickness of 0.007 inch to 0.016 inch.
For Letters, the maximum weight is 3.5 ounces, minimum size is 3½ x 5 inches, maximum size is 6⅛ x 11½ inches, and allowed thickness is 0.009 x ¼ inch.
Expand your knowledge: First Class Mail Weight
First-Class Mail Flats, or large envelopes, have a maximum weight of 13 ounces, minimum size of 6⅛ x 11½ inches, maximum size of 12 x 15 inches, and allowed thickness of ¼ to ¾ inch.
To summarize, here are the key size and weight restrictions for First-Class Mail:
Letters
Letters can be a bit pricey, especially if you're using a non-standard envelope. Standard-sized, rectangular envelope stamps start at $0.73.
If you're sending a square, oversized, or unusually shaped envelope, be prepared to pay a bit more - at least $1.19.
For comparison, that's a difference of $0.46 between a standard and a non-standard envelope.
Weight, Size, and Shape Specifications
Weight, size, and shape specifications can be a bit confusing, but don't worry, I've got you covered.
First-Class Mail Postcards have a minimum size of 3½ x 5 inches and a maximum size of 4¼ x 6 inches. The allowed thickness is between 0.007 inch to 0.016 inch.

Letters have a maximum weight of 3.5 ounces and a minimum size of 3½ x 5 inches, with a maximum size of 6⅛ x 11½ inches. The allowed thickness is 0.009 x ¼ inch.
First-Class Mail Flats, also known as large envelopes, have a maximum weight of 13 ounces, a minimum size of 6⅛ x 11½ inches, and a maximum size of 12 x 15 inches. The allowed thickness is ¼ to ¾ inch.
First-Class Package Service has a maximum weight of 13 ounces and a maximum size of 108 inches in length and girth combined.
If your mailpiece doesn't meet these standards, you might be charged extra or have to send it via a different mail class.
Here's a quick reference guide to help you remember the weight and size limits for different types of mail:
Remember, these are general guidelines, and you should always check the USPS website for the most up-to-date information.
Delivery and Tracking

The delivery window for First-Class Mail is pretty straightforward: it's estimated to take one to three days from the postmarked date, with local deliveries potentially taking just one day. However, it's essential to remember that these estimates are not guaranteed by USPS.
You can track your First Class Mail shipment from departure to arrival, giving you peace of mind about its journey. This detailed tracking feature is a significant advantage of using First Class Mail.
Optional insurance is also available for added security against loss or damage, so you can protect your valuable items during transit.
Postcards
Sending postcards is a classic way to stay in touch with loved ones. Standard-sized, rectangular postcards can be sent for $0.56 with a special postcard stamp.
If you have an oversized postcard, you'll need to use a letter stamp, which starts at $0.73.
Here's a quick reference guide to help you plan your postcard sending:
- Standard postcard: $0.56
- Oversized postcard (letter stamp): $0.73
Delivery Times Expectations

First-Class Mail delivery times are estimates only and not guaranteed by USPS, but you can expect it to take one to three days from the postmarked date.
If you're sending something locally, your delivery might only take one day. This is a great option if you need to get something to someone quickly.
A crucial aspect of sending mail is understanding delivery timelines, which is particularly important when your shipment needs to arrive by a certain date. First Class Mail is a reliable service.
Here are some estimated delivery times for First-Class Mail:
Tracking is a significant feature of First Class Mail, providing peace of mind by allowing you to follow your mail's journey. With detailed tracking, you can track your shipment from departure to arrival.
You might like: Track Us Priority Mail
International and Commercial Services
Sending mail internationally has never been easier, with First-Class Mail International offering a cost-effective way to reach over 190 countries with just one Global Forever stamp.
The one price for up to 3.5 oz rate for First-Class Mail presort and automation compatible letters and cards is a great option for businesses to include promotional messages with bills, invoices, and statements.
If you're sending a 1 oz letter or postcard, you can send it globally with just one Global Forever stamp, and it never expires, even if the postage rate goes up.
If you're a business sending bulk mail, you can take advantage of first-class mail commercial pricing for presorted letters and flats with a minimum quantity of 500 mailpieces.
You can also qualify for automation discounts, which may apply to your mailpieces.
International
International mail can be a bit tricky, but don't worry, we've got you covered. First-Class Mail International is the most affordable way to send letters and lightweight packages globally.
You can send a 1 ounce letter or postcard to over 190 countries with just one Global Forever stamp, which never expires, even if the postage rate goes up.
It's worth noting that Global Forever stamps are a great option for international mail.
Discover more: 1st Class Forever Stamps
USPS Services

The USPS offers a range of services that make international and commercial shipping easier and more efficient.
One of the standout features is Enhanced Tracking Capabilities, which keeps you informed at every step of the shipping process.
This means you can stay on top of your packages and make any necessary adjustments or updates.
The USPS also prioritizes Eco-Friendly Packaging, innovating sustainable packaging solutions that reduce waste and minimize environmental impact.
These efforts not only benefit the planet but also reduce costs and make your shipping process more sustainable.
Here are some of the key services offered by USPS for First Class Mail:
- Enhanced Tracking Capabilities: Keeping you informed at every step.
- Eco-Friendly Packaging: Innovations in sustainable packaging solutions.
Choosing the Right Service
First Class Mail is ideal for sending lightweight items, making it the economical choice for standard-sized envelopes and small packages.
If you're sending a standard-sized envelope or a small package, First Class Mail is the way to go. It's typically delivered within 1-3 days.
For slightly heavier items, consider First Class Package Service – Retail, which offers tracking and a slightly higher rate for in-person retail shipping.
You can also use the following chart to help you decide between First Class Mail and Priority Mail:
Choosing the Right Service

First Class Mail is ideal for sending standard-sized envelopes and postcards, weighing up to 3.5 ounces, and is typically delivered within 1-3 days.
If you're sending lightweight items, First Class Mail is the economical choice. It's perfect for sending standard-sized envelopes and small packages.
First Class Package Service – Retail offers convenient shipping for lightweight parcels with tracking and a slightly higher rate for in-person retail shipping.
For slightly heavier items needing quicker delivery, consider Priority Mail, which offers faster delivery and includes flat rate shipping options.
Here are the key differences between First Class and Priority Mail:
First Class Mail Flats/Large Envelopes are designed for larger documents like magazines, legal papers, and booklets, weighing up to 13 ounces.
First Class Mail Parcels are perfect for small packages weighing up to 13 ounces, offering tracking and delivery confirmation.
What Makes a Great Service?
First-Class Mail is a higher priority class than Marketing Mail, Retail Ground or Media Mail, which means the USPS prioritizes its delivery speed over those services.

A great service is one that delivers on its promises, and First-Class Mail does just that by offering a faster delivery speed than other services.
First-Class Mail takes precedence over Priority Mail services in delivery speed, despite its name suggesting otherwise.
A service that consistently delivers on its promises builds trust with its customers, and that's what makes a great service.
First-Class Mail's priority status means it's a reliable choice for sending time-sensitive mail, such as bills and payments.
A great service is also one that offers a range of options to meet different needs, and First-Class Mail is no exception.
Explore further: First Class Mail Delivery Time Map
Return
You can't get a refund for First-Class Mail, unfortunately. This is a one-way service, so be sure to double-check your address before sending.
If you do need to track your mail, you can opt for services like Return Receipt or Collect on Delivery, which provide some tracking information. However, not all First-Class Mail options are eligible for tracking.
If you're sending a postcard, letter, or flat, you won't be able to use USPS Tracking, but you can still insure your mail for peace of mind.
Here are some options for sending First-Class Mail:
- Visit your local Post Office
- Use an approved-shipping service like PitneyShip
Frequently Asked Questions
Is first class mail same as regular mail?
No, First Class mail and regular mail are not the same, with key differences in price, delivery speed, and address correction options. Understanding these differences can help you choose the right mail service for your needs.
What is the difference between regular mail and first class mail?
First class mail is a faster and more expensive option that includes additional services, while regular mail is a more affordable option with standard delivery times
Sources
- https://www.usps.com/ship/first-class-mail.htm
- https://www.pitneybowes.com/us/blog/what-is-the-difference-between-first-class-mail-and-regular-mail.html
- https://www.stamps.com/usps/first-class-mail/
- https://www.legalzoom.com/articles/how-long-does-first-class-mail-take
- https://www.atomixlogistics.com/blog/ultimate-first-class-mail-guide
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