Kiln Shrink Sizer takes the guesswork out of clay shrinkage. Clay shrinks 10-15% from wet to fired, so hitting an exact finished size - a lid that fits, a jar to spec, a matched set - means throwing it larger by just the right amount. Kiln Shrink Sizer does that math for you, instantly. - Save each clay body with its measured shrinkage percentage - Enter the finished size you want, get the exact wet size to throw - Or enter your wet size, see how big it will end up after firing - Switch directions with a single tap No accounts, no internet, no clutter - just a fast, focused studio tool. Everything you enter stays on your device. Built for studio potters, ceramics students, and anyone tired of guessing at shrinkage.