A perfect size for a small mirrorless. In my case a Fujifilm X100V with filter, hood and handstrap. This fits snuggly one side of the divider. The other side I put the wide angle attachment and my car keys. The divider has some SD card slots and a inner partition for a mobile phone, which is a great idea, but will only fit phones up to iPhone 8 / SE 2020 size. There is a front pocket which has a fully rain cover and I put my other keys and bits and pieces including cleaning cloth, etc. The shoulder strap is connected on swivel loops, which I don't know why every bag doesn't have, its so convenient. The bag is rigid and good looking. I would like ThinkTank to think about all leather version, but otherwise this is the perfect day bag to travel light for a small mirrorless