How small do you need the instrument to be for your purposes? I have several smaller multi objective microscopes I collected over the years because of their exceptional optical quality , with an eye to using them as field scopes. My requirements kept changing over time and I now am in the latter stages of finishing off a petite 4 objective binocular, so these other scopes need a new home. If you are interested in one of them, you can have it for what I paid for it. The largest of the lot is under 4 lbs. with it's wooden case included, some much smaller, although none are really pocket scopes.
A friend is travelling to Serbia in about 3 weeks and I can get her to take it , in order to save you shipping. She will be landing in Belgrade and staying in Sabac, while there.
I will send you a p.m. with my email. If you are interested I can send you pictures of what I have and my cost prices on them.
Sure, i would love too see what you have used and see if any match for me, i will send you my email.
As for the size i do not have an exect value just something lighter then my 1946 Reichert, which is really heavy.