Roughly 28" x 17" x 21" tall. Two openings, one in the front and one up top. One in the front is zip tied shut because of shenanigans but easily can be opened. Width of the bars means it is not suitable for small small animals such as mice, hamsters or gerbils. Full sized rats would thrive. Since thick ramp and shelf is included, could work as a small cage for guinea pigs. Giving away full unopened bag of pet safe bedding with cage. No accessories included. A little dusty from storage, but in good condition. Please specify pickup window in response, thanks!