6.4mm A4 Black Wiro Binding Rings - 3:1 Ratio Cut Pieces

These 6.4mm A4 black wiro binding rings are 3:1 ratio cut pieces designed to hold up to 15 sheets of standard 80 gsm paper. The slim profile makes them perfect for thin reports, proposals, presentations and booklets. Made from durable black-coated metal, they provide a clean, professional finish for short documents that still need the quality of wiro binding.

How to Measure Wiro Binding Rings

Measure wiro binding rings by the diameter across the loop at the widest point. A 6.4 mm ring fits approximately 15 sheets of 80 gsm paper. Match the pitch ratio (3:1) to your binding machine. For slim documents, choose a ring diameter close to your paper stack thickness to avoid loose binding.

Technical Specifications

Frequently Asked Questions