I purchased the following Fauxdinis for my kids, age 6 and 9, in size XS. I also got a size XL for myself.
http://www.ebay.com/itm/Mens-Wind-Jacket-Lightweight-Cycling-Windshell-Running-Windbreaker-Sportswear-/251961090630?pt=LH_DefaultDomain_0&var=&hash=item3aaa0d2246
Note that this link is same as Ethan A.’s above. It is not the same link as Marc-Andre’s above.
Comparing Houdini to a Fauxdini
I have a L Houdini which fits me perfectly. The XL Fauxdini is a bit smaller. I may try an XXL. For reference, the only reason I got a Fauxdini for myself is to have a light color version (my Houdini is red) for dealing with day time mosquitoes in the Sierra. Ideally I would also like to use a light color Fauxdini for sun protection but am not sure if the material would offer much SPF.
The Fauxdini jackets are well made and the fabric is breathable. Unlike the Houdini they do NOT have: 1) a zippered chest pocket, 2) adjustable elastic hood toggles and 3) adjustable elastic waist toggles. To clarify, the hood and waist have elastic, it just isn’t adjustable.
Finally, compared to the other Fauxdini (see Marc-Andre’s link), the hood is not foldable. Given how light the hood is, this is my preference.
As Marc did above, tomorrow I’ll post a picture of my XL Fauxdini over my L Houdini.