I've made these bags several times now, and they fit our Psalter book and a standard size Bible. This style is my 'boy' version, but my oldest daughter already told me that she prefers it over the 'girl' one :)
For the 'girl' version of this bag I like to make it with pleats or gathers on the front. The style is inspired by this pattern.
There are so many more fabrics in my stash that would work great for these bags, and it's fun to have a quick finished project. Now if only I could finish off the five quilts that are in progress, maybe I could spend more time making these . . .