Binding Diameter Guide

PLASTIKOIL® binding is available in 25 diameters and 45 colors. The column ‘Sheets of paper’ is a general guideline only. Paper can vary in thickness depending on the type and grade. To give an accurate estimate, the book / report should be measured with a ruler or calipers.

Sheets of paper (20 lb. bond with 2-10pt covers)	Diameter of coil to be used in millimetres	Book thickness in inches
35 sheets	6 mm	5/32” (4 mm)
47 sheets	7 mm	3/16” (5 mm)
60 sheets	8 mm	1/4” (6.35 mm)
70 sheets	9 mm	9/32” (7 mm)
80 sheets	10 mm	5/16” (8 mm)
90 sheets	11 mm	3/8” (9.65 mm)
100 sheets	12 mm	13/32” (10 mm)
110 sheets	13 mm	7/16” (11 mm)
120 sheets	14 mm	15/32” (12 mm)
130 sheets	15 mm	1/2” (13 mm)
140 sheets	16 mm	9/16” (14 mm)
150 sheets	17 mm	19/32” (15 mm)
160 sheets	18 mm	5/8” (16 mm)
170 sheets	19 mm	11/16” (17.5 mm)
180 sheets	20 mm	3/4” (18 mm)
200 sheets	22 mm	25/32” (19.8 mm)
210 sheets	23 mm	13/16” (20 mm)
230 sheets	25 mm	7/8” (22 mm)
260 sheets	28 mm	1” (25 mm)
280 sheets	30 mm	1-1/16” (27 mm)
290 sheets	32 mm	1-1/8” (28.7 mm)
315 sheets	35 mm	1-3/16” (30.2 mm)
340 sheets	38 mm	1-5/16” (33 mm)
385 sheets	42 mm	1-3/8” (35 mm)
400 sheets	45 mm	1-9/16” (40 mm)
460 sheets	50 mm	1-7/8” (47.8 mm)