The USB can fit anywhere: your bag , your pocket, your computer case. It is so soft it will not damage anything or scratch your laptop or iPhone when put together.
The advantage of the leather is that it is so easy to pull out of the computer when done with it, and so easy to grip. And believe me, some of the sticks I have incur a wrestling match to get the lid off! Not so this little beauty, it is perfectly formed and so easy to use.
Highly reccomended and would buy one again should I ever have the need.