As the other reviewers said, both cans are Thom Thumb size. However, my cabinet is fairly large and having larger cans might be too much garbage.  The small cans force you to take out the garbage more often. Also, I have room to store the bags and other items on one side.  I also put the recycle bin in the front since I use that more than trash.  It's also very easy to assemble since the rack (that slides with the cans) is already in place