it measures approximately 14" wide X 8.5" tall and side width measures 6.5" Each end of the bag has flaps which can be opened or closed and when flaps are open there is a breathable mesh covering .. it zips on top also
Lola was only in it once for like 2 min because as soon as she was in it i knew it was to small... but shes 12 inches long so i wasnt long enough for her to be comfy
hope this helps