I have a 19x26 toe I put my mat an flat ironing board and rulers in It has one large pocket on one side, that's where my mat and ironing mat go. the other side has a place for rulers and vinyl pockets where I place my rotary cutter and any other necessities I would like. It unzips on three sides for easy loading and unloading. You can get them at JoAnns. They lay flat in the car. I had one of those combo mats and forgot to turn it over for ironing and ironed on the cutting side. Bye bye combo.