LLC standards?

[express2100 154]

I am working on my first vinyl job for a concrete mason. I know the LLC should be in caps but shouldn't there be a comma and space before it? I say yes but some disagree. Also is it alright to have it quite a bit smaller than the business name?

[mabscotthandyman 1,410]

The proper way is comma space LLC

DAN'S SIGNS, LLC

[express2100 154]

Thanks!