From round to slant to D rings, there are a lot of different types of poly binders with variations in-ring styles to choose from. These are affixed into the spine of the file folder to hold a certain capacity/number of your important documents.
So, it’s very important that before you make your next purchase of loose-leaf binders you must know the application and reason behind the designing of different types of ring shapes.
Let’s break down it for you!
Types of Binder Rings Available in The Market
Following are the most common and popular ring shapes which have crowded the binder market:
Round Ring:
They are manufactured in a traditional circular shape and can hold a standard capacity of sheets. With round rings screwed in the spine, a binder has a capacity of 16mm to 65mm. Its size can vary from 1”,1.5”,2” up till 3”. These round rings are generally. found in small-scale poly binders.
Key Feature of Round Ring:
- Economical & easily available
- Can be drilled on the spine of the binder cover
- Wide range of ring width available
- Can hold a minimal number of pages
Standard D Ring:
D-ring binder allows your documents to lay flat. They are costly, yet a durable, long-lasting option to file up your paperwork. This ring style is perfect for settings where a client needs to continuously open and close the binder. D ring can accommodate 25% more paper records than the standard round ring.
Key features of Standard D Ring:
- Greater page capacity than standard rings
- Ring is usually installed on the spine
- More tough and heavy-duty
Slant D Ring:
The slant feature helps in lying your documents flat. Are designed even for the smallest size like ½ “. They can hold 20-30% more page capacity than circular ring binders.
Key features of Slant D Ring
- Costlier as compared to round rings
- More long-lasting than O-rings
- Greater page capacity
What Are the Common Mistakes People Make When Measuring the Size of the Ring?
One must take into consideration that a loose-leaf binder ring size (1.5”,1”) is measured based on the diameter of the ring and not the broadness of the binder spine.
You must take calibrations horizontally, inside the ring at its widest point, in line with the flat open cover.
Ring Size vs Page Capacity-How Much Can a Poly Binder Accommodate?
Below is a table of ring sizes of one inch and the corresponding number of sheets it can hold in.
| Ring Size ( E.g 1 inch) | Page Capacity (Number of Sheets) |
| Round Ring | 100 |
| Slanted D Ring(Angled D Ring) | 220 |
| Standard D-Ring | 275 |
| Gapless Loop Ring (3”) | 625 |
So, if you are still confused about which size and type of leather portfolio binder will best suit you, then give us a call at +86 20 8726 8836. Our customer service team will guide you through the entire process of selection.