Altoids tin. This size is perfect for your purse or the glove box. Now you will never meet someone and have to say, "He's cute, take my word for it." And an altoid tin is so much less nerdy than pulling out those flip-down things people used to have in their wallets!
The model I based this off of only had four or five pages--mine has 12. It makes for a tight fit in the tin, but it does fit! I don't think any more than 12 double-sided pages would fit, though.
I made each page first, then I turned the first 12 upside down and glued on the ribbon. After that dried, I glued the exposed side of the ribbon and set down the other 12 pages. After everything dried, the album folds accordion-style into the tin.