10.5 Inch Spongebob Squarepants Plankton Plush Doll Go to amazon.com Related posts Expert choice for plankton robot toy FeatureMeasures Aprox 10.5 Inches (18.5 Including the Antena);Made of Polyester Fibers; Soft, Cuddly, and a Great Companion to Have with You. DescriptionMeasures Aprox 10.5 Inches (18.5 Including the Antena); Made of Polyester Fibers; Soft, Cuddly, and a Great Companion to Have with You.