Filters up to 77mm can be used, but I've never seen small bags that aren't big enough. The maximum size I could cram into its small, flat plastic case was 68mm, and I had to crank it in there. Also, the straps didn't inspire confidence that I absolutely wouldn't scratch this really expensive filter. . . hey. Maybe I'm too sensitive, I don't know, BUT other than that it's a very good case. It folds up easily, the velcro is well stitched and the lightweight nylon upper and piping feel durable and otherwise lovely. Well, if you have little microfiber bags to put your filters in, I can easily imagine it taking three 77s. However, in my last situation with three large filters, each in its own box, I had to use a hair tie (small elastic bungee) to keep them closed because the velcro just wasn't enough. So why give 5 stars? I think it's a good product for the price, although you have to jump through some low hoops to make it work better. I've attached three photos of the largest case covered with JUST filters and closed with three cases like I've used recently. As I said, if you have a tight-fitting bag-like suitcase, you could fit a much larger trio. Hopa theesa helpa yoo / Mario
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