Bag Fetish -
The toiletry 15 is small compared to the cosmetic pouch, I actually have all 3 - toiletry 15, toiletry 19 & cosmetic pouch. You can fit alot more in the cosmetic pouch, it is the only one I actually use to carry make up, LOL.
I use the 15 to hold my iphone and cles (which holds my ear phones, cleaning cloth etc) and I use the 19 to hold other odds and ends in my purse so my purse is all organized. I took some pics for you for comparision, but it is still early here and not enough natural light to see clearly. I put the cles in one pic so you can an idea of how big the 15 really is. The funny thing in the 2nd pic which compares the cosmetic pouch & toilety 15 there doesn't look like much difference, but there really is. I will try and take better comparision pics again later. Good luck deciding!