Pottery Rib for Mugs, Mixed Bubble Shaping Tool. Pick your size and color

Pottery rib for throwing bold "mixed bubble" mugs and cups. Choose your size and color! Available in six sizes from 4 to 6 inch (100–150 mm). ✨ DESIGNED FOR USE Holes for grip and for hanging on a pegboard Flat profile that works for left- and right-handed potters, just flip it over 📏 WHICH SIZE? Sizes are the rib's overall height. Relative to clay weight: 100–110 mm suits small cups (~450g) 120–130 mm suits everyday mugs (~500g) 140-150 mm suits tall mugs and tumblers (~600g) Clay shrinks as it dries and fires, so finished pots come out smaller than the rib. How much depends on your clay body. Want all six? Choose "Full set of 6 sizes" in the dropdown. 🏺 HOW TO USE - Throw your cylinder close to its final height first, then use the rib to refine the shape - Keep the clay and the rib wet - Support and push the wall from the inside with your other hand and let the rib shape the outside - Start with thicker walls, because shaping with the rib stretches and thins them - Make an undercut at the base of the cylinder so you can place the foot of the rib into it - Go slow but with confidence - Second passes are better than too much drag in the first pass 🔧 CARE Rinse off slip after use and let it dry before storing. 🚚 MADE & SHIPPING Designed and 3D printed by me in my home studio, where I use these ribs for my own mugs. Made to order in 3–5 days, plus delivery. Thank you for supporting an independent maker!