You need help choosing a pet? I used to need help choosing a pet all the time. I have never known what kind of a pet I want; except I knew I really wanted one (or two, or more).
I love small pets so much I wish I could have hundreds!
But, my small apartment does not allow me to have so many of them.
Not every pet, even if it is small, is good for a small apartment. Choose one that will fit in your little apartment, and I don't mean just physically.
If you have a family, see which pets are best pets for families.
Children have different needs when it comes to pets. They can not take care of it the same way you can. So they have to find one appropriate to their age and responsibility level or you should just be prepared to clean after it.
Here is a list of pets that can live without big backyards. It is a starting point to help you choosing a pet that will be fairly easy to keep in small spaces:

This is a list of pets that can be kept in small spaces considering their size. You still have to take in consideration many more factors to make final decision.
You can have so many different reasons for wanting a pet and even more factors that will limit your choice. Think well before you get one. If you make a wrong choice you could end up with a pet you don't know what to do with.
I am going to do my best to help you with these and any other thoughts you might have. I went through all of them.
Making the right choice is sometimes more of a trouble than actually having a pet.
Consider your life style. And in this case, your apartment. I am focusing on your small apartment (house, room, studio…) because that is what this site is all about – small pets in small spaces.
You will get more details about each pet in their sections on the site and it will be easy to choose one to fit your needs.
You spend a lot of time at home and like to play with animals? You can choose almost any of the small pets. Cats, dogs and guinea pigs love playing with people.
You are the opposite, with very little time available? Consider do you want to get a pet at all.
You say definitely yes? Well then get a pet that doesn't need you to play with it and actually prefers you not touching it. Choose small pet turtles or fishes.
Choosing a pet bird
Best bird as pet for kids and beginners
Guinea pigs as pets
Turtles as pets
Go from choosing a pet to Cool Small Pets home page