What Size Bindings or Binders Do I Need?

The #1 question we often get asked is “What size do I need of (insert product here) in order to fit (insert number of sheets here)?” Since this is such a frequent request, we have made some simple charts to help guide you whether you are using Plastic Bindings, Plastic Coil, Wire-O or Loose-Leaf Binders. It is important to note that when we refer to “sheets” we are referring to the sheet of paper both front and back equaling to one. When we refer to “pages” we are talking about how one sheet of paper is in fact two pages (the front is one page and the back is a second page).

Plastic Binding

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Plastic Binding Size	Number of Sheets 20lb Bond w/ Cover
1/4″	20 Sheets – 40pgs
5/16″	35 Sheets – 70 pgs
3/8″	50 Sheets – 100 pgs
7/16″	65 Sheets – 130 pgs
1/2″	80 Sheets – 160 pgs
9/16″	95 Sheets – 190 pgs
5/8″	110 Sheets – 220 pgs
3/4″	130 Sheets – 260 pgs
7/8″	160 Sheets – 320 pgs
1″	190 Sheets – 380 pgs
1-1/8″	210 Sheets – 420 pgs
1-1/4″	220 Sheets – 440 pgs
1-1/2″	280 Sheets – 560 pgs
1-3/4″	350 Sheets – 700 pgs
2″	400 Sheets – 800 pgs

Plastic Coil Binding

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Koil Size	Number of Pages 20lb Bond w/Cover	Size of Koil in Inches	5 to 1 Pitch	4 to 1 Pitch
6mm	25 Sheets – 50 pgs	1/4″	*	*
7mm	35 Sheets – 70 pgs	9/32″	*	*
8mm	40 Sheets – 80 pgs	5/16″	*	*
9mm	50 Sheets – 100 pgs	11/32″	*	*
10mm	60 Sheets – 120 pgs	3/8″	*	*
11mm	70 Sheets – 140 pgs	7/16″	*	*
12mm	75 Sheets – 150 pgs	15/32″	*	*
13mm	80 Sheets – 160 pgs	1/2″	*	*
14mm	90 Sheets – 180 pgs	9/16″	*	*
16mm	110 Sheets – 220 pgs	5/8″	*	*
18mm	130 Sheets – 260 pgs	22/32″	*	*
20mm	150 Sheets – 300 pgs	3/4″	*	*
23mm	170 Sheets – 340 pgs	7/8″	*	*
25mm	190 Sheets – 380 pgs	1″	*	*
28mm	215 Sheets – 430 pgs	1-1/16″	*	*
30mm	235 Sheets – 470 pgs	1-3/16″	NA	*
35mm	275 Sheets – 550 pgs	1-3/8″	NA	*
40mm	300 Sheets – 600 pgs	1-9/16″	NA	*
45mm	335 Sheets – 670 pgs	1-3/4″	NA	*
50mm	375 Sheets – 750 pgs	2″	NA	*

Wire-O

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Diameter of Wire	Number of Sheets 20lb Bond w/Cover	Wire-O Pitch 3 to 1	Wire-O Pitch 2 to1
1/4″	25 Sheets – 50 pgs	*	*
5/16″	40 Sheets – 80 pgs	*	*
3/8″	60 Sheets – 120 pgs	*	*
7/16″	70 Sheets – 140 pgs	*	*
1/2″	80 Sheets – 160 pgs	*	*
9/16″	90 Sheets – 180 pgs	*	*
5/8″	110 Sheets – 220 pgs	*	*
3/4″	150 Sheets – 300 pgs		*
7/8″	170 Sheets – 340 pgs		*
1″	190 Sheets – 380 pgs		*
1-1/4″	230 Sheets – 460 pgs		*

3 Ring Binders

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Size	Round Ring Sheet Capacity	“D” Ring Sheet Capacity	Slant “D” Ring Sheet Capacity
1/2″	90	-	-
5/8″	100	135	-
3/4″	150	170	-
1″	190	235	250
1-1/4″	250	290	-
1-1/2″	265	350	375
2″	400	475	500
2-1/2″	500	600	650
3″	600	-	750
4″	-	-	900

  For more tips like this, click here to explore our other articles. Have more questions? You can call us 1-877-285-7044 or e-mail us and we will be more than happy to help.