I had ordered a couple of these Objektivköcher in size "S" for my Micro Four Thirds lenses. Unfortunately, these are still relatively large in diameter for most MFT lenses. With a bit of bubble wrap, however, may be a solution. Have been able to discover any small (inexpensive) bag on Amazon, so this still the lesser evil are likely. The M.ZUIKO 12-50mm adjusts in length to just so still pure, the opening can be even with the cord no longer quite close. Lens length should therefore maximum 70-75 mm long (the 12-50mm is lt. Olympus 83mm long).
Otherwise, the product is ok but - processing makes a good impression. Longevity remains to be seen ...