I can fit my trifold wallet no problem but this wristlet only fits vertically. I could probably turn the wristlet once I got it inside but that might stretch the bag. It is narrower at the top opening than the bottom. Sunglasses will fit. Hope this helps.What does the size compare to? Can you fit a large wallet in it? Sunglasses?
Edit - my glovetanned pencil case fits at the bottom but just barely.

