This felt insert in the XL size, which the seller lists as 13.4(W) x 7.1(H) x 6.7"(D), perfectly fits the Marc Jacobs 'The Tote Bag' in Large, leather version. I'm thrilled about this, as that leather bag is excellent, except its interior bottom is canvas, thus, this added layer of structure is very much welcome. Also, the insert's height is fantastic, as it comes up just below zipper level of the bag's inner pocket. While I can't yet speak to its longevity, this insert will protect the bag just fine. Of note, but not a deal-breaker, the bottle holder section is far too wide for a standard 8-16oz water bottle or thermos, but not to the point that it tips over...my best tip is to "secure" it by nudging your essentials in the insert around it.I also found that this very same insert fits into the Versace La Medusa/Frequenza Canvas tote. The length and height are perfection as it is for the MJ tote. The only issue is that the width (base) of the insert is a hair too wide, so it does smoosh into itself a tiny bit. I'm ok with this, however, since the bag is a sturdy canvas, and the insert otherwise fully fits to protect its shape and structure. In like manner to the MJ, the height comes right up under the zipper pouches so that they are easy to access. It's unobtrusive and adds a layer of protection that I'm so thankful for. Don't hesitate, get this!