While there is no official standard size for posters, over the decades many printing and advertising companies have been using the same consistent sizes for poster printing.
This resource discusses the dimensions and rules that are commonly used for printing posters worldwide. Using the dimensions in this guide will assure your poster printing project will turn out to be a success - no matter what printing company you choose.

Also called Ledger, Tabloid or ANSI B size. This is the smallest standard poster size, they are mostly used for flyers, street lights, bulletin boards, and generally putting up on businesses without taking up too much room and offending. These also work great with a minimalist approach to text. Big letters big message. Size in Millimetres is 279 x 432mm.
Also called Architectural C size - A little more information can be displayed on this standard poster size. I would still recommend some minimalism and little text. These posters are mainly seen as small adverts on university residence floors, doctor's offices, construction walkways and bulletin boards. Size in Millimetres is 457 × 610mm.
Also called Architectural D Size - This is the most common standard size for posters. These posters are used for most applications including outside of events, trade shows, and malls. Also widely used for small movie posters delivered to fans and posters for decoration like in University residences and outside a pub or club. With these types of posters you will be grabbing attention with a large message and you can include further details in small writing so after the message is received people can choose whether to come closer and learn more. Size in Millimetres is 609.6 mm x 914.4 mm.
Note: If you are designing a poster you cannot go wrong by using the dimensions that we described above, they are used by printing companies worldwide. Don't be afraid to work with different dimensions though: Posters are printed on rolls of paper (not on sheets) and can therefore be cut in any other dimension. If you want create a poster larger than 24 x36 Inch be sure to contact your printer first, and confirm that he is able to print your desired size.There are 2 different dimensions for movie posters that the film industry has standardized. Both are typically in portrait format:
The "One-Sheet" size is used in the official advertising for films.
Both are typically printed on paper stock and usually rolled for aesthetic reasons.
Be aware that the mentioned dimensions for film posters are approximate, and do not have to be exactly in the sizes mentioned above.

Note: Film posters sold in retailing are in poster size, which is 24 x 36 inches.
Common landscape (horizontal oriented) format movie Posters also called HALF-SHEET measure 22" x 28", and are generally printed on thicker stock paper.
For further in-depth information about movie poster sizes visit Cinemasterpieces and Wikipedia.
Choosing the right paper to print your posters is essential. The first thing to note is: Always use Acid free paper for poster printing. You do not want your printed poster to turn yellow after a while, therefore the papers you use for printing should be acid free.
The best stock to use for your poster depends on many factors, that are not defined by hard rules.
These factors include:
As a rule you want to make sure to use stock that is heavier (thicker) then default printer papers.
Not only does this add durability to your poster, it will age much better then standard paper, and your poster is much easier to flatten.
We recommend to choose paper weight of at least 60lbs (90 g/m2) or above for your poster project. This really is the minimum weight you should choose for (bulk) production.
If your budget allows it, preferably choose heavier papers like (80 lbs - 120 g/m2 or 90 lbs - 163 g/m2). This will give your poster a more luxurious feel and will add longevity to your poster.
When creating your own poster make sure to create your document in CMYK mode in 300DPI and set a healthy amount of bleed around the edges so that essential pieces of the poster are not cut off after the printing. For more information read our printing guide to avoid common printing mistakes.
» Free downloadable high-res Vintage posters for printing.
» Reviews of the best poster printing services.
Using the holiday sale offer saved a nice amount on my holiday cards offer. Their quality was good, colours were vibrant and the stock was of good quality. Most importantly: delivery wa on time (2 days later) Like every year I was late with my order, so there wern't a lot of options to get my cards done in time. When i saw the offer from Overnight prints i took it, and looking back im glad i did.
Rating: 5 / 5
I used to shop for personalized gifts at Cafepress, but tried InkGarden after reading your recommendation. Service and quality are wonderful and the prices are much better when you compare to Cafepress.
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Rating: 5 / 5
Very Poor and inefficient company, wasted dozens of calls and hours of time on the phone with them trying to correct an error that a 3 year old could fix in 2 minutes! - Could have made better cards myself. Upgraded and Paid €39 to ensure good quality and ended up with complete crap.
Rating: 1 / 5
Snapfish is converting to a new site, and I had to communicate with at least four-five different CS reps. I admire people who can speak multiple languages, but this became ridiculous.
They all were obviously using the same script (e.g., "I am more than happy to help you with that. Please kindly hold on the chat for a minute, meanwhile I look up the information."), and in the end, none were able to help me. I really wanted to communicate with a manager, not about the CS reps, but about the problems with Snapfish's new site.
My problem stems from the conversion of classic Snapfish to the new Snapfish. I started a photo book on another photo site (with no problems). Because a family member downloaded photos I want to include to Snapfish, I had to start over on Snapfish. Two of my images wouldn't download, (requiring 2-3 chats before someone finally figured out what to do), the size/format of the book I want is not available in the new Snapfish (which I learned after starting it on classic Snapfish and another chat), and photos shared on the new Snapfish cannot be transferred/shared with the classic Snapfish (another chat). So I either needed to use a different book (more expensive) or not include the photos.
Apparently, these features will be available once the new Snapfish is complete. Why on earth would any company introduce a new version before all features are available or before the bugs are worked out--beta version? I'm ordering prints of the photos on the new Snapfish and will scan them to include in my photo book on the other site. Then I'm done with Snapfish
Rating: 1 / 5
I been using a local print shop for my business card printing needs, while quality was high, prices were also very high. I heard about Moo from a friend and decided to give them a try. I just received the business cards and I'm pleased: Quality is great, color is correct and the cards have a nice "thick" feel to it, also the packaging is very nice. Overall the quality i got from MOO is even better then the local print shop i used, and the price is a lot friendlier. I hope these guys will stay for a while!
Rating: 5 / 5