This amazing palette lets you store up to 21 colors in fairly large volume and take them with you in the field, classroom, and on vacations. Measured at 13-3/4" 9 7/8" 2", this airtight palette system fits into virtually anything and never needs washing - paint just peels off after completely drying. If you wish to keep paints longer, continue to mist periodically to keep from drying out. Paints will last up to a month or more with weekly misting when not in use, based on extensive testing by actual acrylic artists. A perfect gift for that aspiring or already professional acrylic artist!