Masonry block size on specific site

Hello,

i'm using full premium version of your theme and it's awesome! Thanks you for your great work.

And here is my question:

I'm using Masonry Layout, my Main Menu is using Categories as menu positions. Each postion is directing me to site with posts from specific category and here is the point - I would like to that masonry block size in specific category would be different size f.ex. Main Site has masonry block size MEDIUM and i would like to that other site with posts from different category has masonry block size set to SMALL. Is there any possibility to do this?

Sorry for my poor English

Cheers,
Pawel