Looks like they go as large as 3XL, which is about 44in/117cm depending on where you look. This is really cool and I'm really tempted into getting one. $12 isn't bad for something that looks like it does the job well and has no shipping. The wait might be a pain in the neck, but I'll be surprised if it comes as quick as my first binder which was 8 days. The estimated wait is 11+ days, but we'll see how that goes if I throw something in.