PORRIDGE N PICKLES OFFICIAL BLOG

After spotting the Louis Vuitton Montsouris on Kendall Jenner, I have been craving one for myself (not because she has one BUT because I hadn't actually noticed it before then, I know, i'm never with the times, I always latch on to trends after they have been and gone...). I have been doing some research on this style of backpack from LV and I believe that they come in three sizes small, medium and large (maybe a mini as well?), i'm unsure of what they are defiantly called though (sorry!). I'm personally looking for the medium sized because I think it would best suit what i'm looking to carry with me.
Anyone know where I can get one of these?!