Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: what is the outside width (not depth, please) at the widest point, when folded?
Document: I picked up a short metal two step ladder years ago and I was always annoyed with it. Opening and closing was bothersome. The rubber footing fell off and scratch the floor. This ladder fix those problems. I feel very secure standing on the top step. It looks great. And the best part is that when folded it's very narrow (2 1/4 inches depth) so it's easy to store any where. I slip it between the wall and refrigerator.
I got my Cosco wood step stool in the mail a few days ago, and immediately realized that some of the problems identified by other reviewers were not, in fact, problems. I don't know if those reviewers were mistaken, or if Cosco has improved this product, but here goes:1. Assembly? No. The step stool arrived in a flat box, folded but completely assembled. I didn't have to do anything but set it up.2. Unsightly stickers? No.
The ladder accommodates my ability to use all the high cabinets in my house. The house has very high ceilings and, thus, cabinets which exceed the function of a footstool. I'm very pleased with the ladder from the functional point of view. Aesthetically it looks just fine standing along a tiny wall space as a table for a flower pot.
I have two high bookcases, and did not like the step ladder I used to access the top shelves. I was please to find a good looking 3-step stool, but when I received it, it was damaged. Amazon kindly replaced it quickly. (This package was damaged, and the side rails were not padded.) I use it nearly every day for more than the bookcase access because it doesn't take up much space and is easy to collapse.
this step stool has finally solved a persistent problem in high places in a 70 year-old kitchen!! 'mirabile visu'  saved having to renovate that old kitchen which we loved! the stool combines safety with attractive design! updates the old kitchen to modern design! !
this is the best step stool i have ever used. it is the most durable and sturdy piece i have ever used i will trust me or my wife to stand on this piece
the 3 step ladder is a great help for those hard to reach places... I can leave it out & it looks fine..plus, it's very stable...
nice sturdy ladder that can be displayed in any room it is solid and will support a 220 lb man.
looked like it had been returned once. brackets are riveted and cannot be tightened. rod that holds step slips out of bracket.so far we set plants on steps but do not use it to stand on.i would try another brand if i could start over.
i had a hell of a time finding a 3-step stool that wasn't ugly as hell.I get it. Most of things  are made with some kind of compliance in mind. Which requires rubber grips and heavy-duty plastic, none of which is easy on the eyes.Of the few downsides of living in an open-plan loft with 15-ft ceilings, one is that most of the things you own will be out in the open.
Answer: It is 18" wide when folded.....or open. The only thing that changes is the depth.  It is 2.25" deep when folded flat.  It is a beautiful, sturdy step ladder that matches my inexpensive espresso 'custom' closet-maid closet perfectly.Hope that answers your question!