Expect it a little bulky because it's hard-case so your glasses are well protected. The zipper is hard to maneuver at times, and the compartments for the glasses are only big enough for kids or flat glasses. Since I bought this case for my daughter, both her sun and prescription glasses fit just right, (note, no extra room to spare) and the pink color is pretty so it worked out for us (hence 4 stars).
If purchase is for an adult, take a look at the picture, your glasses have to be that style or size. Even one pair of my XOXO sunglasses barely fit because the middle flap/partition got in the way.