You are absolutely going to love this Brush Holder Duo from Waffle Flower Crafts. This package contains two holders that are made from high quality silicone. These holders are designed to work with the original Water Media Mat (sold separately). These holders measure 3 5/8" x 3 1/8" x 1 9/16". These holders have a wavy top for holding the wet brushes in between uses. They can sit on the mat horizontally or vertically. They can be used with or without the Water Media Mat. These holders are coated with an anti-static solution for easy cleaning with a dampened lint-free cloth or oil free cleaning wipe. Warnings: Some pigments may stain the holders. Objects with sharp edges should not be used as they can damage your mat. Oil-based products should not be used as they can damage the holders.