3.25''W x 8.5''L x 5.5''H. It has a black mesh center divider. Though those are the dimensions the bag expands and you can DEFINITELY hold a lot of products in there. Clarisonic (with TONS of room to spare), UD Naked Palettes fit with about 1/2" to spare on the ends, brushes fit no problem. Bag feels good and is thick on the outside. Amazing bag!