Over all size 17.5ÂH x 12ÂL x 8ÂW Extendable sides for additional space. Can be used as a backpack, tote, or car seat. Comes with a telescoping handle with wheels for easy travel as a rolling case. Meets most airline travel regulations (see specific airlines for details). Removable pad is included for easy cleaning. Can be tethered to secure your animal.