I think it is the photo makes the 5 look smaller than the 10. But, the 5.3 is pretty close to 10.3. In fact, the 5.3 is a lot smaller and lighter than my 10.2 with the small add on grip that I had on it.Wow, I didn't realise that the '5' was the titch of the family.
That looks really coolJust gotten a half leather case for my Pen F, with customised initials.
https://www.mu-43.com/attachments/upload?type=post&context[thread_id]=9702&hash=8d790b5e557244603e1fac61cf055e2aView attachment 823068
I bought a used 17mm f1.8 and am impressed with how good it is - and how tiny. I'm very happy with my sample.