hmm, maybe you could display them in baseball card binder inserts? Would most fit in those?
also, if you have larger/smaller stickers, you could get photo sleeves that also fit binders. I've seen them in all sizes from wallet size photos to 4x6 to 8x10. I'd avoid those "cling" type photo pages though. They damage photos and they'd probably damage your stickers. You want the ones with actual pockets.
For small stickers, you could also try coin binder inserts that coin collectors use.
They all come in standard 3-ring binder sizes..