What is the difference between a flyer and a postcard?
A flyer is usually printed on lighter paper at sizes such as 8.5 x 11 or 5.5 x 8.5 inches and carries more copy. A postcard is printed on thicker cardstock at smaller sizes such as 4 x 6, 5 x 7 or 6 x 9 inches, with one side often reserved for an address. The format that works best depends less on the design and more on how the piece reaches people.
| Factor | Flyer | Postcard |
|---|---|---|
| Typical sizes | 8.5 x 11, 5.5 x 8.5 in | 4 x 6, 5 x 7, 6 x 9 in |
| Paper | Lighter text or cover stock | Thicker cardstock |
| Best distribution | Handouts, boards, counters, inserts | Mail, counters, parcels |
| Copy length | Room for detail | One offer, short copy |
| Handling | Can crease or tear | Stiffer, survives mail and bags |
| Mailing | Usually needs an envelope or folding | Mails as is, if size rules are met |
Which format suits each distribution method?
Write down the distribution method before choosing a size. A piece handed out at an event is read in a few seconds and often carried away. A counter piece sits in a holder, so only its top portion may be visible. A parcel insert is found after purchase, when the reader already knows the brand and needs a next step. A mailed piece competes with the rest of the mail.
- Event handout: a flyer or small card, depending on how much people need to read.
- Notice board or window: a flyer, sized for the space and viewing distance.
- Counter holder: a card or rack card sized to the holder.
- Parcel insert: a postcard or insert card sized to the box.
- Mailbox: a postcard that meets postal size and thickness rules.
For counters, measure the holder. For inserts, measure the inside of the packaging. A heavier stock matters more for pieces that are handled repeatedly or travel through the mail.
What size does a postcard need to be for USPS?
Under the USPS Domestic Mail Manual, a card qualifies for card prices when it is at least 3.5 inches high, 5 inches long and 0.007 inch thick, and no more than 4.25 inches high, 6 inches long and 0.016 inch thick. The ratio of length to height must fall between 1.3 and 2.5. A 4 x 6 postcard fits. A 5 x 7 or 6 x 9 postcard is larger than the card limits and mails at letter prices.
A piece becomes a flat when it is more than 11.5 inches long, more than 6.125 inches high or more than 0.25 inch thick, up to 15 x 12 inches. Every Door Direct Mail Retail requires flat size pieces and accepts at least 200 and up to 5,000 pieces per day per ZIP Code for retail drop offs. A product called a postcard is not automatically eligible for a particular rate, so check current rules directly with USPS before production. The postcard sizes for mailing guide and the EDDM print checklist cover the details.
How much copy fits on a flyer versus a postcard?
A flyer can hold an explanation, a short list of services, a map or a menu. A postcard should focus on one offer, one reason to act and one route to respond. Sketch the essential message first. If the copy does not fit comfortably, edit it or choose a larger format rather than shrinking the text. Text below about 8 points is hard to read on a piece handed over quickly.
The guide on how to design a flyer covers hierarchy for longer copy, and the same headline, offer and action structure works on a postcard with fewer words.
Which paper weight suits each format?
Flyers handed out and discarded quickly can use lighter paper, while flyers pinned to boards or displayed for weeks benefit from a heavier stock. Postcards need enough stiffness to survive mail processing and to meet the USPS minimum thickness of 0.007 inch. The flyer paper weight guide explains how text and cover weights compare. For mailed postcards, a thicker card also feels more substantial in the hand.
How do you compare cost and response fairly?
Include distribution in the comparison, not only print cost. Flyers handed out at an event have no postage but need staff time. Postcards mailed to a route add postage but reach every address. A counter piece costs almost nothing to distribute but depends on the host location.
Record how many pieces were handed out, packed or mailed and what action recipients could take. Use a separate landing page or code for each channel so responses can be compared. Test a small run before committing to a large one.
Can the same artwork work for both?
Rarely without changes. A counter handout needs its headline visible while it sits in a holder. A parcel insert may need a short instruction or support route instead of a sales message. A mailed postcard must reserve space for the address and postage on one side. Reusing identical artwork across those moments usually produces the wrong hierarchy for at least one of them. Make a paper mockup for each use and adjust the layout accordingly.
What is a flyer or postcard checklist?
- Write down how each piece will reach people.
- Measure the holder, board, bag or box it must fit.
- Check mailed pieces against current USPS size and thickness rules.
- Keep the copy to what the format can hold at a readable size.
- Reserve the address and postage area on mailed postcards.
- Give each channel its own landing page or code.
Frequently asked questions
Is a flyer or a postcard better for marketing?
Neither is better in every case. A flyer suits handouts, notice boards and waiting rooms where people have time to read more detail. A postcard suits mail, parcel inserts and counters where the piece must survive handling and deliver one offer quickly. Decide how the piece will reach people first, then choose the format that fits that route.
What size postcard qualifies for USPS postcard rates?
The USPS Domestic Mail Manual sets card limits of at least 3.5 x 5 inches and no more than 4.25 x 6 inches, with a thickness between 0.007 and 0.016 inch and a length to height ratio between 1.3 and 2.5. Larger postcards, such as 5 x 7 or 6 x 9 inches, mail at letter or flat prices.
Can you mail a flyer without an envelope?
A flat flyer on thin paper is usually not suitable for mailing as is. Folded self mailers must meet USPS rules on size, thickness and sealing, and an unfolded 8.5 x 11 inch sheet is a flat. Many businesses choose a postcard instead, or place the flyer in an envelope. Check current USPS requirements before printing a mailed piece.
What is the most common flyer size?
In the United States, 8.5 x 11 inches is the most familiar flyer size because it matches Letter paper, followed by half letter at 5.5 x 8.5 inches. Other sizes suit specific uses, such as rack cards for display holders. Choose the size that fits the board, holder or bag where the flyer will be seen.
Sources & specification notes
The references below support the relevant technical or product details in this guide. Examples and checklists are not claims of practical testing or universal supplier requirements. Confirm the current specifications for your chosen product before production.
- USPS Domestic Mail Manual 201: Physical standards for commercial letters, cards, flats and parcels ↗
Sets card dimensions (3.5 x 5 in minimum, 4.25 x 6 in maximum for card rates, 0.007 to 0.016 in thick), letter and flat limits and the 1.3 to 2.5 aspect ratio.
- USPS: Every Door Direct Mail ↗
EDDM Retail accepts at least 200 and up to 5,000 pieces per day per ZIP Code, and mailpieces must meet the physical standards for flats.
