This makeup brush organizer is 12″L X 13″W when unrolled. It is tall to store large brushes with a long flap to keep them protected and secure There are a total of 12 slots in the makeup brush roll. They range from 1 1/2″ to 3/4″. However, several of the slots will easily hold two or even three brushes, depending upon the brush size. I have put up to 20 brushes in my roll with no problem. The brush roll also comes with a tall flap that will easily cover brushes up to 9″ tall. Many makeup brush rolls use a ribbon to keep the contents secure. However, this brush roll uses a button and elastic closure. I have found over the years that your brushes stay more secure and you do not have to worry about a ribbon tie becoming undone during travel or between uses, especially when brushing against other contents in a suitcase or travel bag. The roll is made from 100% high-quality designer cotton so can be put in the washer/dryer for quick and easy cleaning. The roll is also fully interfaced for stability and strength. These makeup brush rolls would make a great birthday gift, bridesmaid gift, or for the frequent traveler in your life. They also work great for knitting needles rolls, paintbrushes, or crochet hooks. Sorry, makeup brushes are not included.