Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: What is the length of the wedge bolster?
Document: We used two, wife covered it, she recommends an inner lining and then the cover. With the pillows in front of the bolster during the day, it is just about right to function as the sofa.
I bought this wedge for my day bed. It is the right size and makes the day bed look more like a sofa than a bed. The support is firm and comfortable. Very happy with my purchase. However, I wish I could have found a cover for it in Amazon instead of Jcpenny that is taking forever.
which is to say, I've never felt the extra firm, but normal wedge is very solid, nicely made. I was worried and almost bought the &#34;extra firm&#34; but at almost $20 apiece more, glad I took the cheaper route. *won't hold up to cannon..will be fine for my bad shoulder&#34;
I had to put this item outside for 5 days before the chemical smell died down enough to make it tolerable to put on my bad, even then I wondered if I was killing brain cells to be able to put my injured leg up. The one good feature is its length...I can put both legs up, but I'm not fond of the angle and find it hard to get comfortable as well.
This is the perfect solution for my day bed and my back problems. Much better sleep and comfort and back support.
I wish I would have found one with a fitted cover... It picks up every hair and dust, yuck. Would not buy again.
I was skeptical at first with I got these foam bolsters, I didn't think they were cut evenly, but when the covers came, everything fit perfectly. They were packaged nicely too, so they didn't get dirty in transit. Thanks.
I purchased two of these for my day bed. They work well for what I needed them for. They are perfect. Thank you.
I love the purchase of these bolsters, just what I wanted and I was not disappointed. Shipping was a bit more than I expected but they arrived on the exact date that was told me. Fast shipping and accurate, properly packaged for the weather, and over all I recommend this product and company.
I bought these for a daybed, but ended up putting them on the couch temporarily. I left them there when I realized they support my back just right. a reviewer of the extra firm said it was hard as a rock so I went with firm. Firm is very supportive but not too hard. I covered them by wrapping half of a king size fitted sheet around each one. They do have a chemical smell, but that's what happens with foam.
Answer: Mine is 36", 1/2 the length of a twin bed. So,you need 2 to go across the "back" of a daybed/twin bed.  Love mine & def recommend the firmest you can find. Btw -I found that JC Penney's had the best options for covers for them (and the day/twin bed).   Hope this helps.