I don’t know the brand of my dive bag, but it’s aprox the same size as my largest suitcase, with two zip on regulator pockets on top of that, and I’ve never had anyone measure it. They have however tried to ding me for weight. That is why I carry my heavy regulators and dive lights inside my camera bag as carry on. I think my large dive bag weighed 49 lbs on my last trip, and no one was the wiser that my pelican camera case weighed 65 lbs.