Originally Posted by barturtle

I have both the 18" and 15" Folders; either will fit in my Arkel Utility Basket (I have the older buckle-top version, not the newer zip top) with the 18' sticking up a bit beyond (but the top flapping over to hold it in). The 15" will also fit into my Carradice SQR Slim just fine or my laptop bag-when only a couple items are in it due to thickness issues with my laptop bag. It should fit just fine into most messenger bags too.

One of the tricks to using the folder is to interfold your clothes...don't fold and stack as this creates hard folds and wrinkles that get set, but instead use the articles of clothes together to create soft folds, put socks into the folds, or some kind of "core object" to let you wrap around...here's a good article on the concept