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The clear polypropylene overlay makes both customizations and repurposing a breeze, so you’ll keep using your UniKeep binder for years to come.

3 Ring Binders

No matter what you've got to keep together, UniKeep case binders store your materials in a completely enclosed case, keeping them protected from dust and damage.  That’s why they’re the archival-safe choice of professionals and hobbyists alike. The clear polypropylene overlay makes customization and repurposing a breeze. You'll keep using your UniKeep case binder for years to come.


3 ring binder_sizes_chart

Your Comprehensive Guide To 3 Ring Binder Sizes

The 3 ring binder is very popular and you are probably already using at least one in your business or at home. But did you know that there are several different 3-ring binder sizes? Well, there are and there is a good reason for all of these different size binders. We want to fully explain all of the binder sizes and their purpose here.

It is essential that you are aware of the different ring binder sizes so that you can make the right decision when it comes to purchasing 3 ring binders. So you need to ask yourself the question “what size binder do I need?” and then make an assessment about how much you want the binder to hold.

You can always refer to this 3 ring binder sizes guide to check out the different size binders available and we will keep it up to date. Whether you are looking for the smallest binder size or the biggest binder size you will find all of the information that you need here.

The Type of Rings are Important

Most people take 3 ring binders for granted because a binder is just a thing to help you keep your documents together right? Well, that’s true but you need to know that the different ring binder sizes are available for a reason. That reason has all to do with binder capacity, in other words, how many pages can a binder accommodate?

Before we start looking at the different 3 ring binder sizes let’s take a look at the different types of rings used in binders. There are three main types of binder ring and they do a different job:

Round or “O” Ring

3 Ring Binder Sizes

This is the binder ring that you are probably the most familiar with. It is circular and normally measures one inch in diameter. There are larger binder ring sizes available.

The “D” Ring

3 Ring Binder Sizes

It will probably not surprise you to know that this is in the shape of a letter “D”. The height of this “D” ring is usually one inch.

The Slant “D” ring

3 Ring Binder Sizes

Here the ring is “D” shaped again but the rings are set at an angle. As with the standard “D” ring, there is one straight edge and the most common size for this is one inch.

You may have heard the term “one-inch binder” before. This is nothing to do with the size of the binder itself but the size of the binder rings. The one-inch binder has become the standard binder size.

So the next time you hear questions such as “how many pages does a 1-inch binder hold?” or “how many pages fit in a 1-inch binder?” you will know what this means. The answer to these questions is really dependent on the type of rings that the binder has. We will answer these questions and more later on.

A “D” ring binder will hold more pages than a round ring binder. It doesn’t matter if it is a straight “D” ring or a slanted “D” ring. Another advantage of the “D” ring is that they are on the back cover of the binder and as a result of this your papers will lay flat. Round rings attach to the spine and your papers will not lay flat with these.

The main difference between the standard “D” ring and the slant “D” ring is durability. The slanted “D” rings tend to be more durable but they cannot hold as many pages as the standard “D” ring.

Have a look at the tables below for the different types of rings and their approximate capacity of pages:

“O” or Round Ring

Ring Size: Sheets (Approx)
1.5 inch 100 Sheets
1 inch 175 Sheets
1.5 inches” 275 Sheets
2 inches 375 Sheets
3 inches 460 Sheets

Standard “D” Ring

Ring Size: Sheets (Approx)
1 inch 275 Sheets
1.5 inch 480 Sheets
2 inches” 540 Sheets
3 inches 670 Sheets
4 inches 780 Sheets
5 inches 1300 Sheets

Slanted “D” Ring

Ring Size: Sheets (Approx)
0.5 inch 120 Sheets
1 inch 220 Sheets
1.5 inches” 375 Sheets
2 inches 480 Sheets
3 inches 600 Sheets
4 inches 725 Sheets
5 inches 975 Sheets

Remember the questions from earlier? Well now you can answer these with these tables and also answer questions like “how many pages fit in a 2-inch binder?” and “how many pages does a ½ inch binder hold?”

Three Ring Binder Sizes

A 3 ring binder will always be larger than the pages that it needs to hold. The reason for this slightly larger size is all about protecting the pages that the binder holds. If the binder was the same size as the pages then there is a good chance that pages would protrude out from the binder and would be a lot more likely to suffer from damage.

How to measure binder size? Well, we will explain this with an example. Let’s assume that you want a 3 ring binder for “letter” sized paper which is 8.5 inches by 11 inches. The binder needs to be a bit larger to protect the letter paper so letter binders usually measure around 9 inches by 12 inches.

There are three key measurements with 3 ring binder dimensions which are the overall height, the width of the front and back and the width of the spine. So for our letter example, the width of the front and back would be 9 inches, the height would be 11 inches and the spine width can be anything from 0.5 inches upwards.

You can get three-ring binders in many different sizes. Ring binders sizes are an important thing for you to know about as you want to ensure that you get the right binders for the task they will perform. The largest 3 ring binder will accommodate the largest paper sizes but it is not always necessary to go for the largest binder size.

Take a look of some of the common binder sizes in the 3 ring binder sizes chart below:

Binder Sizes Chart

Small 5 inches by 7 inches
Digest 5.5 inches by 8.5 inches
Photo 8 inches by 10 inches
A4 8.25 inches by 11.75 inches
Letter 8.5 inches by 11 inches
Legal 8.5 inches by 14 inches
Music 9 inches by 12 inches
Scrapbook 12 inches by 12 inches
Art 14 inches by 17 inches
Ledger 17 inches by 11 inches

Please note that the dimensions in the above binder size chart are the paper sizes. The binders will be slightly larger than this for reasons that we explained earlier. So if you want a small 3 ring binder or a large 3 ring binder they are all available to you.

A lot of businesses have different 3 ring binders for different tasks. The majority of their binders may be for letter or even A4 pages but they may well have a large ledger binder as well and maybe even the smallest ring binder for receipts etc.

Always bear in mind that 3 ring binder capacity is determined by the type and size of the rings used. It is important that you estimate the number of sheets that you want a binder to hold so that you end up with the correct 3 ring binder capacity. If you are in doubt go for a larger size of binder such as a 3-inch binder.

If you choose a binder that is too small it will mean that you will have to purchase more binders to accommodate the paperwork that you need to store. A small ½ inch binder may look good but is it really enough for what you need? A larger binder will not cost you much more, and it is worth spending a little extra rather than have to keep buying more binders.

Custom Binders and Binder Materials

A common trend these days is for businesses to have custom binders created. They do this mainly for marketing purposes which is fine. If you are going to head down this path then it is really important that you give the manufacturer precise dimensions for your binders as well as the type of rings and ring sizes.

The other thing to consider is the material to use in the construction of your binders. You can find binders made of many different materials nowadays and the most popular type is the plastic ring binder. For extra strength and durability, you can choose a binder with a cardboard core that has a layer of plastic on top for protection.

Think about the environment when you are making your choice of materials. Once you have finished with plastic binders they will end up at a landfill. You can go for a cardboard binder if you want to do your bit for the environment or even choose binders made from different materials such as leather and fabric.

Now you can choose the Right Binders with Confidence

You now know that there are a lot of different 3 ring binder sizes and that they will always be a little larger than the size of the paper that they will hold. You also know that the type of rings and the size of the rings determine the 3 ring binder capacity.

We have an excellent guide to 3 ring binders here if you want more information about them. If you need any help with deciding on the right 3 ring binder sizes for your needs then we will be delighted to help you. Please contact us here.

Always think about the task that you want your binders to perform before you make a purchase decision. If you want your binders to hold a lot of pages then you will need to go for larger 3 ring binder sizes. Whatever you need we can provide the right binders to you.

How Many Sheets will my 3-Ring Binders Hold?

Preparing for a meeting or major presentation is not entirely the best news for some people; especially if your materials will need to make the ideal impression on your supervisor or a potential client. The amount of pages of paper (sheet capacity) a 3-ring binder can hold is dependent upon the size of the binder (that is the ring dimensions quantified as inches) along with the sort of ring style.

However, without proper preparation, you could discover at the last moment that your binders will not hold your most major documents properly. If you don't want your presentation to turn into a complete catastrophe, it is essential to ensure that your custom 3-ring binders would be the proper size for the materials you intend to include.