Tan carrier is small for under airplane seat and opens from the top. Would also be great for a rabbit or hamster or ferrit. Light blue is for a small cat or small puppy. Dark green and the navy blue are both same size: 23Tx20Wx30D. The blue door needs fixing to stay shut. All have been cleaned and sterilized. Tan is $10, light blue is $15; the dark green is $30; navy blue is $25. — in Sarasota, Florida.