Mudtools Pottery Ribs – Shape 3 Polymer Rib (Yellow Soft), 5" Wide Clay Shaping & Smoothing Tool (Y3)

The Mudtools Polymer Pottery Ribs Shape 3 is the wide-sweep workhorse of the Mudtools rib line. At 5 inches across, it was purpose-built for potters who throw large — big bowls, platters, vases, and wide open forms where you need a rib that covers ground fast and leaves a clean, smooth surface behind. What sets Mudtools apart is the material. This isn't off-the-shelf rubber or a repurposed kitchen spatula — it's a proprietary polymer engineered for the demands of wet clay. It won't crack, won't develop burrs, and actually gets better with use as the surface burnishes to a glassy smoothness. The Shape 3 comes in four flexibility levels, each color-coded: Red (Very Soft) for gentle contouring and thin walls, Yellow (Soft) for general throwing and smoothing, Green (Medium) for potters who want a rib that holds its shape under pressure, and Blue (Firm) for aggressive shaping and compressing. Michael Sherrill, the designer behind Mudtools, keeps the Green and Blue close when working on larger pieces. Beyond the wheel, the Shape 3 pulls its weight in hand-building and sculpture — the wide face is excellent for blending coils, smoothing slabs, and refining broad curved surfaces. If you're throwing anything bigger than a mug, you want this rib.

• Pottery Ribs Built For Larger Work — At 5 inches wide, the Mudtools Shape 3 delivers a broad, sweeping stroke across the clay, making it the go-to choice for potters throwing larger bowls, platters, and wide-walled forms on the wheel.
• Balanced Control with Extending Reach: The size and profile give good contact across broad surfaces without sacrificing tactile feedback. It’s a dependable shaping tool whether you’re throwing, hand-building, or refining sculptural contours.
• Choose Your Flexibility: Available in four color-coded stiffness levels: Red (Very Soft), Yellow (Soft), Green (Medium), and Blue (Firm). Select the flex that matches your clay body, throwing style, and the level of pressure you work with.
• Signature Polymer Flexibility: Crafted from Mudtools’ unique flexible polymer that resists wear and burr formation, Shape 3 ribs become naturally burnished with general studio use.
• Made in the USA by Mudtools: Designed by potter Michael Sherrill and trusted by ceramic artists worldwide. Built to last, easy to clean, and comfortable in the hand—every studio needs at least one.