Quick answer

For most quilters and sewists, the OLFA 45mm blade is the best all-around choice. Choose the 28mm for curves and small blocks, or the 60mm for cutting multiple layers at once.

Why blade size matters for your rotary cutter

Each OLFA blade size fits a specific rotary cutter handle — 28mm, 45mm, or 60mm. Using the wrong blade can damage the cutter or produce uneven cuts. The size also affects how many fabric layers you can cut at once and how easily you can navigate curves or tight corners.

Trade-offs at a glance

  • 28mm blade: Best for curves, small blocks, and intricate shapes. Requires a 28mm rotary cutter. Cuts fewer layers than larger blades. Keep one on hand for appliqué and mini quilts.
  • 45mm blade: The standard size for most quilting and sewing. Fits 45mm rotary cutters. Good balance of control and layer capacity. Start here if you only own one rotary cutter.
  • 60mm blade: Designed for cutting multiple layers at once. Fits 60mm rotary cutters. Less maneuverable for tight curves. Use when batch-cutting or working with thick batting.

OLFA blade options at a glance

  • OLFA Rotary Blade 45mm: The OLFA 45mm blade is the most popular size for quilters and sewists, made from high-carbon steel for lasting sharpness. This size handles most quilting and sewing projects — from cutting strips to trimming blocks — without needing to switch blades.

    OLFA Rotary Blade 45mm

    OLFA Rotary Blade 45mm

  • OLFA Rotary Blade 28mm: The OLFA 28mm blade is designed for curves, small quilt blocks, and intricate shapes with control and precision. Its smaller diameter gives you better visibility and maneuverability for detailed work like appliqué or curved seams.

    OLFA Rotary Blade 28mm

    OLFA Rotary Blade 28mm

  • OLFA Rotary Blade 60mm: The OLFA 60mm blade cuts cleanly through multiple fabric layers and is engineered for clean, precise cuts. When you need to cut several layers at once — for example, when prepping a stack of quilt squares — the larger blade saves time without sacrificing cut quality.

Which blade should you choose?

Best for

  • Everyday quilting and sewing — 45mm blade
  • Detailed, curved cuts and small blocks — 28mm blade
  • Cutting multiple layers or thick materials — 60mm blade

Not for

  • Cutting multiple layers — 28mm blade
  • Tight curves and appliqué — 60mm blade