MM / IN
Punch Style*
Louis Vuitton
Filofax
Gillio
Pocket
81 x 120 MM
6 Ring (19 MM)
PM - Small Ring
Pocket
Pocket
A6
105 x 148 MM
6 Ring (19MM/38 MM)
x x
A6
Personal
95 x 171 MM 
3.74 x 6.74 IN
6 Ring (19MM/50 MM)
MM - Medium Ring
Personal
Medium
Personal Wide
4.75 x 6.75 IN
6 Ring (19MM/50 MM)
x x x
Mini Happy Planner 4.625 x 7 IN 
7 Discs
x x x
B6  5 x 7 IN
6 Ring (19MM/50 MM)
B6 Wide 5.3 x 7 IN
6 Ring (19MM/50 MM)
Half Letter
5.5 x 8.5 IN
8 Discs
Desk Agenda x x
A5
148 x 210 MM
6 Ring (19MM/70 MM)
GM - Large Ring
A5
A5
Franklin Covey Compact 4.25 x 6.75 IN
6 Ring (19MM/50 MM)
x x x

 

*Measurements are of the distance between each ring and each set of rings. Most ring planners will have two sets of three rings. Each of the three rings in one set are 19mm apart. The distance between the two set of rings will vary. For example, personal rings have a distance of 50mm between the two set of three rings. A5 have a distance of 70mm between the two set of three rings.