It may take filters up to 77mm, but not in any case I have seen, the little pouches are not big enough. The biggest I could squeeze in still in it's little low profile plastic case was 68mm and I had to crank it in there. Additionally, the webbing didn't install confidence in it's I'm-totally-not-going-to-scratch-that-really-expensive-filter .. . . ness. Now maybe I'm being hyper sensitive, dunno, BUT, it is a very nice case otherwise. It folds easily, the velcro is sewn on well, the light duty denier nylon outer and edging seem long lasting, and is otherwise delightful. Now if you have little microfiber bags to put your filters in, then I could easily see it taking three 77s. In any case, in my recent situation with three big filters, each in there respective boxes, I had to use a hair tie (the little elastic bungies) to keep it closed cause the velcro just didn't reach. So why give it 5 stars? I think it is a good products for the price even if you have to jump through a few low hoops to make it work best. I've included three pics of the biggest case, closed with JUST filters, and closed with three cases in it as I used recently. Like I said, if you have some form fitting bag-like cover you could fit a much bigger trio. Hopa theesa helpsa yoo /Mario