Both sites have a strange notion of 'Full Description'; neither give any dimensions (except thickness of padding for the gig-bag...)..!. The Thomann site is no better, but the first comment on that site states that the bag is fine, but tight, for a telecaster, but one will definitely not be able to fit a Jazzmaster into it. From that alone, I'd recommend looking for a more roomy bag. Here's the Thomann offering; VAT has to be added to see the shipped cost, and there may be a shipping delay, but it will fit a Jazzmaster. Hope this helps.
Thomann : Jazzmaster gig bag ...