Rayson PROC1230M Click Binding Spines, Easy Edit Spines, 1/2 Diameter, 90 Sheet Capacity, Multicolor, 30/Box

The 34 hole click binding ring fits A4 sized paper (8.3 x 11.7inches), which is not a standard US letter paper size (8.5 x 11inches). Binding letter

Rayson WR21127M Wire Binding Spines, Multicolor, 2:1 Pitch Double Loop Binding Wires 1/2 Inch, 21-Loop Wire Ring Pack of 100 with Black, Gold, Blue, White, Silver : Office Products

LooseLeaf Binding Strip Plastic Coil Removable Clasp

Rayson PROC1530M Click Binding Spines, Easy Edit Spines, 3/5

The 34 hole click binding ring fits A4 sized paper (8.3 x 11.7inches), which is not a standard US letter paper size (8.5 x 11inches). Binding letter

Rayson PROC1230M Click Binding Spines, Easy Edit Spines, 1/2 Diameter, 90 Sheet Capacity, Multicolor, 30/Box

Rayson WR32159M Wire Binding Spines, Multicolor, 3:1 Pitch Double Loop Binding Wires 5/8 Inch, 32-Loop Wire Ring Pack of 50 with Black, Gold, Blue, White, Silver : Office Products

Swingline GBC Binding Spines/Spirals/Coils, 5/16 Diameter, 45

Rayson PROC1230PK Click Binding Spines, Easy Edit

Carl Office Equipment LR-30105-K Loose Ring, Binding

Proclick Binding

Rayson WR32159M Wire Binding Spines, Multicolor, 3:1 Pitch Double Loop Binding Wires 5/8 Inch, 32-Loop Wire Ring Pack of 50 with Black, Gold, Blue, White, Silver : Office Products