I was wondering about the width across dimension... The dimensions for the Saleya MM according to vuitton.com is... 17.7 x 11.2 x 7.9 I've read before somewhere on tPF that the 17.7" was referring to the top (widest point) of the Saleya MM (going across: from zipper to tab) is this correct?? If so, Do any of you know what the bag measures across at the base? (...being that it goes in a bit at either side..) TIA!!