Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: what is the height of the chair
Document: I like the chair but at 5'11&#34; I feel like I'm sitting on the floor. Order the height adjusters (adders) for sure if you're in this height range.
I love this chair. I read some bad reviews and was worried that it might be to short but it's not. I'm 5'7 and it is the perfect height for my desk at work (if it were any taller I could not use it) I was also concerned about it hurting my back but I use it all day at work and its fine.
I have had this chair for several months and use it  daily in my office. It has made a huge difference in my posture and I don't feel the stess in my shoulders and back after an 8 hour day. I did purchase the height adapters, but they made the chair to tall for my use. I highly recommend this to others.
I gave it to my husband because it hurts my tailbone. We removed back off chair It can't support weight or it will break. It rolls great on carpet & is perfect desktop height. It isn't comfortable at all. I used to sit on the exercise ball for years on the carpet that didn't have stand & it was ALLOT more comfortable than having Ball inside roller pedestal.
I have been using the chair for about a month and I still like it. It did take some getting used to but it keeps my back straight which is what I was aiming for. Although there is some adjustment in height by filling or emptying the ball,  it is not enough to change the height of your body. My office manager is only 5'2 and it sits her to short for her work station. I am 5'7 and it works great for me.
The worst part, to return this desk I contacted the company and was told that I would have to pay for shipping. Now I had thought the shipping would be around 3-4$. I was wrong. It was 19$ to ship the chair. So, not having the use for this I paid the 20$. No the product was not defected, but the company should really point out on the product page the recommended height.
I returned this a day after I bought it. I was really exited to get this chair. I wanted to love it but I couldn't. Why? Im too tall. When I purchased this desk I figured it may be a bit short do I purchased the extensions along with the chair. They did not help. I think it may not be the height of the chair, it may be more of the back of the chair.
After I inflated the ball to the recommended size and placed it in the chair, the size and height of the ball was perfect. I am four feet and eleven inches tall, and the chair with the rollers on the bottom was the perfect height for my desk. I am giving serious thought to buying another one for my breakfast room table. Sitting for long periods is not a good idea, but if you have to sit, why not make it a little challenging for your body?
I shopped around for a chair like this quite a bit. Used to use a plain balance ball as a chair and liked that well enough, but the ball was always rolling away whenever I got up.The price on the IsoKinetics brand of this chair is pretty good compared to others. I was disappointed that the only way to adjust the height is by inflating or deflating the ball (I am 6 feet tall and this chair is only rated for up to 5'11").
Overall I quite like the ball chair. I got the leg extenders as not sure about height from description.I was having issues with pressure on the nerves behind my knees in my old office chair. Since using this chair, the pain has completely cleared up. And I think it's strengthening my 'core', too!The caster's could be better. I'm on hardwood floor with a chair mat and they can't even manage that small edge when I'm sitting in the chair.
Answer: yes