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

Input:
Question: I see that Seat width is 13 inches but what is the size of the wheelbase. I've seen other chairs have it listed with sizes from 18 to 24  inches
Document: I have two places I sit to do my make-up. This stool - because it is adjustable in height, while not being too large - works well in both spots. The seat is very comfy! A great bargain for the price.
I have a home office on hardwood floors and the rollers on this chair is really gentle to the wood and glide effortlessly. Also the lack of a back on this stool forces me to sit up right. Seat is actually pretty comfortable too.
Arrived quickly and was Easy to assemble, works great and is very comfortable! I like this one better than the ones we use at work (medical setting) the seat is more comfortable and it rolls quietly.I only wish I would've found it sooner...
I was pleased with this obvious safety feature, because i was concerned initially before it arrived that I would have it slip out from under me. When I want to roll in the stool while completely sitting on it, I have to push myself backwards and transfer a tad of weight off the seat (my ass) and to the foot and push. I cannot pull myself forward, but that's the safety of the stool if your doing work on clients to be steady while on it.
They replied requesting me to send them a photograph of the damaged part. I clearly described the part to them in the email. IF they had the slightest familiarity with their product they would immediately know which part I had described. Again, this part isn't worth more than 50 cents! They should have sent it me with no questions asked. They still have not replied to my other email so I've requested Amazon's assistance.
I purchased this stool to be used in my master bathroom. I am recovering from an ankle break, so I thought it would be nice to have a "gliding" stool that I could use to move around my bathroom when I am getting dressed. The stool looks decent enough, but the casters / rollers do not work well and it really doesn't glide on my tile floor - it gets "stuck" every few inches.
This is a great little stool. My husband is 6' 6" and has broken two chairs I had purchased for a little desk I use as a vanity. I looked at these and thought, since he's a physician and sits in these all day, he couldn't possibly break it. Indeed, it's been two months, it still looks great, it's comfortable, and indestructible. He can adjust it to his liking, and I can adjust it to mine, as I am 5'2". It works perfectly.
This was just was I was looking for. Was concerned when I saw it had to be put together, but no worries, it was easy.
I have these in my craft room and everyone who sees them is jealous of their clean lines and ease of operation.
I love this stool, it is so comfy! it looks higher quality than in the pics. I am very satisfied with this purchase!
Answer: With wheels tucked in, from metal leg to the end of one of the farthest legs, it's a bit over 18".  If a wheel is pointed out, that adds about another 1.5" to that leg.  If stability is your concern, I have seat all the way up (bad knees) and the stool is wonderfully stable.