Joan Arc Curve Quilting Rulers by Silly Moon for Smooth, Modern Arc Designs

Also known as curve quilting rulers, Joan Arc rulers are ideal for creating smooth arcs, echo quilting, and modern quilting designs on both longarm and domestic machines.

Each ruler features matching inside and outside curves, allowing you to quilt on either side of the ruler foot for maximum flexibility. This makes it easy to create graceful arcs, repeated curves, and perfectly echoed designs.

Because all markings share the same diameter, Joan rulers allow for clean echo quilting and consistent spacing across blocks, borders, and large open areas.

✨ What You Can Quilt with Joan

• Dividing large negative space
• Flowing arc quilting motifs
• Echo quilting with consistent spacing
• Modern custom quilting layouts
• Block and border framing designs

These rulers are ideal for modern quilts, sampler quilts, and quilts with open backgrounds.

📏 Available Options (Select from Variant Dropdown)

1/4" thickness (longarm / high shank)

Choose the option that fits your quilting style:

• 12″ Joan Arc Ruler (Individual)
  A versatile curve size for blocks, borders, and medium quilting spaces
• 14″ Joan Arc Ruler (Individual)
  A larger curve for bold movement and larger negative space
• Set A – 10″, 12″, 14″
  A perfect foundation set for layering curves and building designs
• Set B – 16″, 18″, 20″
  Ideal for large-scale quilting and dramatic, flowing movement

🧵 Why Quilters Love the Joan Arc Rulers

• Matching inside/outside curves for flexible use
• Consistent radius markings for precise echo quilting
• Easily combine sizes to create layered, dynamic designs
• Suitable for both longarm and domestic quilting

🛠️ Silly Moon Ruler Features

• Precision CNC-machined clear acrylic
• Engraved markings accurate within .002" for visibility and consistency
• Includes optional non-slip tape
• Available in 1/8" (domestic/low shank) and 1/4" (longarm/high shank)

🇨🇦 Designed & Made in Canada 🍁

Silly Moon rulers are proudly designed and manufactured in Canada and trusted by both domestic and longarm quilters.

🧶 Thread Pairing

Many quilters pair Silly Moon rulers with Glide 40 wt trilobal polyester thread for smooth, consistent ruler-guided quilting.

Explore Glide Thread Bundles →

💡 Getting Started Tip

If you're new to arc quilting, Set A (10″–14″) offers the most versatility.
For bold, large-scale designs, Set B (16″–20″) creates beautiful movement across your quilt.