Ideally, you may also wish to choose a chair that has cushioned arm rests. All of this can help to prevent sore and stiff muscles. Another thing you may want to consider when choosing an office chair is whether or not you would like one that is adjustable. Adjustable chairs are great, everyone is shaped a little different, its helpful to be able to adjust your chair so that you are not stretching too much, or hunched over to get to your keyboard.
If you have an overly-large desk or an L or U-shaped one, choosing a swivel chair mounted on wheels is a perfect choice. Swivel chairs that are mounted on wheels offer you better movement and are much easier on floors. Stationary chairs can leave unsightly marks on floors and can even damage carpeting, tile and linoleum.
Finally, it goes without saying that you will also want to pick a chair that goes along well with your desk and accents the overall appearance of your office. Aesthetics are more important than you may think, having a well flowing, attractive work space can subconsciously, make you feel more at ease in your space, and will in turn help to make you more productive.