That is what I'm using mine for! The double pocket is great as you can get two on a page. The only downside-the plastic is VERY flimsy! I had to put heavy cardstock in the back pocket. But, once it's solid it's a great use. Fits any standard 12x12 ring binder. I'm all organized now!
Some of my album are always work in progress., so I use these sleeves to keep extra papers and trims, etc to keep with album. Than when the next event comes along or you find that missing pic or what ever, you have coordinating papers right at hand.