I see reviewers complaining that these pouches aren't very padded. They ARE padded, but it's true the limited padding isn't what you would want around your precious lens for a 10 metre drop onto concrete, but that wasn't what I wanted ! I simply wanted something to stop my lenses clanking together in my photo bag, and these are just about perfect for that job. For my intended use the smelly neoprene bags (that admittedly give much better protection) were just overkill, take up too much space. Likewise the pouches that Panasonic supply with their lenses rule themselves out for use in the field by having rigid bases that take up a silly amount of space.
The only disappointment is the closure system, it uses a pair of coarsely braided cords to pull in opposite directions to effect the closure. The problem is that the cords are so long, so that when rummaging in my bag for something when I have three of these pouches in there, all I can feel is a great tangle of cords ! No problem, I bought some tiny cord lock toggles on ebay and also some smooth 3mm nylon cord, so I can reduce the double cord to single and make it no longer than it needs to be. Now I'm very happy indeed.
I even use one of these small bags for my jumble of oddments, (spare batteries, stacked filters, cleaning cloth etc.), would not be without them.
Size-wise, if your lens were a perfect cylinder 90mm long x 80mm diameter, this bag might "just about" close around it. In practice lenses aren't perfect cylinders, they are wider in the middle (especially with a reversed lens hood), so a 90x80mm lens is actually a good guide. But the point is that these pouches are so soft that even if they are a bit bigger than needed they squash down nicely in your bag.