Instruction: Answer the given question using the supporting document.

Input:
Question: What are the dimensions of this item?
Document: When I saw the dimensions of the product's description it did not register to me how big it was. I wanted a dome-like memory foam pillow to my neck. This pillow turned out to be great for lumbar support but not so for neck. I advise if you are looking for a neck pillow, look for something with less than 3&#34; radius.
great product. pillow hard to find. makes is easier to breathe and doesn't mess the top part of your hair.
This $24 pillow cost $10 to return. Expensive mistake.
Let me first say that I've been looking for the perfect pillow for my neck for 5+yrs, and I've tried many. After reading many reviews, it's really hard to pick just the right pillow. Some say that this pillow is too soft or too hard. If you are looking for a neck pillow with good support this is the pillow for you. It will not flatten and it keeps it's shape, all the while providing great support for your neck.
It's too large and hard to be comfy.I think the suggested uses for non-head-pillow use are fine, but it isn't really appropriate as a head pillow.
I did not find this pillow to be firm enough for the purpose I needed, so returned it. they were prompt to send the label and my money.
Feels great under neck and relieves the cervical DDD I am plagued with. Helps provide me with a better nights sleep.
(The rating does not apply since I never used this bolster.) I needed a knee bolster for lower back relief. Unfortunately, I misunderstood the company's online wording and the recommendation on a review which both purported that this could be used as a knee bolster. This is only 4 inches high -- not what I needed -- and the soft memory foam collapses to nothing with weight on it. (The knee bolster in Physical Therapy is at least 8 inches high -- maybe more.)
"High-Density memory foam ensures ample and cushy support"Cushy? No. This pillow is hard. Very hard. It softens a little bit with body heat, but it is still hard. Uncomfortably so. I do not think of a memory foam pillow as being made from this particular type of foam, but of one of the dense but soft ones.As a result, it's ok as a knee bolster, but as a head pillow it's pretty uncomfortable.
Answer: The D shape pillow is 16" in length, 8" wide at the base and 4" in height