You will enjoy using a rib like this one to work on your large bowls and platters. Measuring about 7 long by 1-3/4 wide and 3/8 thick you can count
Pottery Ribs by Ruby Pear Woodworks – Saltstone Ceramics
Large Emerald Green and Charcoal Kidney Rib, Pottery Tool
Big Pottery Tool, Purple Heart Rib, Large Bowl Rib, Platter Rib, Ceramic Tool, Clay - UK
Triangular Rosewood Pottery Tool, Rib, Bowl Rib, Platter Rib, Thick Ceramic Tool, Clay
Wooden Pottery Rib Tool Triangular Pottery Making Tool
100 Lacewood Fugu Bowl Rib, Wood Pottery Tool
Wooden Fish Platter
Large Soft Cornered Triangular Pottery Rib, Ipe Bowl Rib
This is an extra fat kidney rib made from a dense wood called makore. This kidney rib is more than twice as thick as my regular ribs and is perfect
Extra Thick Pottery Rib, Bowl and Platter Kidney Rib — Troy Bungart Studios | Delightful Designs for Discerning Collectors
Large Platter Rib – Mudtools
Pottery Fish Platter
TRIANGLE 8-PACK TEXTURE RIBS & FOOT SHAPER TOOLS: Embark on an artistic journey with our 8-piece set of triangle texture ribs and versatile foot
Byllstore Triangle Pottery Ribs & Trimming Tools | 2 Foot Shaper Tools | 6 Clay Texture Ribs | Solid Beech Wood | 8-Pack
Padauk, a tough wood and a great form. Sure, none of that really matters when you're making pots but what if how you feel about your choice of tools
Padauk Circle Pottery Tool, Bowl Rib, Round Pottery Rib