I love both the baggallini messenger bag and the wallet bag The messenger bag measures 10x13x4 - plenty big enough to hold both my digital camera and video camera - and everything else I needed for the day - yet it was smaller and lighter than most back packs. I love the way it way fits over one shoulder and it was as easy to wear in 'front' when riding as it was to wear in the back when walking. I often use it at home when taking my DGrD to the mall or the park and need to pack along a few diapers, snacks and wipes- and keep my hands free to hold onto a little one! My younger DD loved carrying the wallet bag in the parks - she doesnt carry much with her, but it all fit and was separated into all the compartments- and the super long adjustable strap could go from shoulder bag to fanny pack. I have been going to WDW for 35 years and have gone through more bags/back packs/ pocketbooks that I can possibly even remember - the baggallini messenger is the best, most comfortable 'park bag' I've found so far!