I called JAX and unfortunately they believe the measurements are incorrect. The friendly woman I spoke to said they are not available in any stores yet, but are on order. She was sending a message to the internet team to recheck and update the measurements. Her best guess was the bag is likely to be about 2" wide, but that was only a guess based on her knowledge of typical slim bags.
Hopefully they will have it all sorted soon.
Hopefully they will have it all sorted soon.