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

Input:
Question: Do standard twin mattress fit in this bed?  Or do they need to be a special size?
Document: The low price is incredible for the quality and sturdiness that we got with this bed frame! I'm super happy, my girls (5 and 4) will have these for a LONG time. Plus, when they get a lot older, we have the option of separating the bunk bed into two twin size beds. Most importantly, I love the low profile because I do not have high ceilings at home. They fit perfectly in a small room.
This is perfect for my girls (age 9 and 6). It is not a good bed for adults, as it doesnt have too much room between the bottom bunk and the top so there is no sitting up - but my girls love it and the price was totally worth it. This is a STURDY purchase and looks as pretty as the pictures. You do NOT need to purchase special mattresses, we just used the girls twin beds - pulled the mattresses off the box springs and put them in this bed.
These beds were not that hard for us to assemble. All the parts came with it thankfully. We didn't set it up as a bunk bed since our twins are too young still, but we have them set up as two seperate beds. They are very well made, the look and feel of it is excellent. It's not flimsy or shaky. The slats are very solid. My only complaint is that I have had some trouble finding a mattress to fit it.
I purchased this bed for my toddler and am already having to look at replacing it. Once we had the bed put together, I was quite pleased with its size and overall look in the room. We placed the bed against the corner walls and we were able to easily put a safety railing under the mattress so that my 2 year old was able to have a &#34;big boy's bed&#34;.
The dimensions are a bit more than the standard size but I am happy with the beds so I will not be sending it back. Yes, I recommend this product but make sure you measure the insides of the bed and compare the dimensions with that of the mattresses before you buy the mattresses.
The put together is easy, except there's very subtle differences in pieces that you need to watch for or you'll have to re do parts  (from experience lol) Not a big enough pain that I wouldnt buy or suggest it, but enough that you'll have a miniature rage session when you realize you have to start again lolThe actual bed feels very sturdy, and its the perfect size for our tiny second bedroom.
The beds simply sit on top of each other, with a support rod preventing them from slipping, so all you have to do is lift the top bunk off the bottom frame and you'll have two twin beds. The ladder needs reinforcement for heavier Top Bunkers and you will need to add some no-slip strips to prevent sock wearers from slipping off. The wooden slats (support for the mattresses) are very sturdy and I have no fear of destroyed mattresses or worse (falling through!
Perfect for my granddaughters. I only wish the ladder fit on either side. Or at least head or foot of bed.
I appreciate that they are flat and not rounded like on other bunk bed ladders. My 5 year old son has no difficulty climbing up and down the ladder. The only possible issue may be the color. Since the color is dark, it may be difficult for young children to negotiate the steps in the dark of night.I really only have two complaints. One is what I already mentioned about the unfinished slats for the mattress support.
Crossbars under the mattress provide very solid support. The overall height is shorter than most bunk beds, which works perfect for our 4 and 5 year olds. We put a 6&#34; mattress on top with a foam topper and this seems to leave a perfect amount of safety support from the rails. With an 8&#34; mattress on the bottom there is enough for our 4 year old to sit up in bed, but barely. Overall this was a great buy for the money.
Answer: Standard Twin Mattresses Fit.