Is there anyway to get my arms thicker, not necessarily muscle wise?

I've always had thin arms. I've always been pretty thin overall. I've never been able to gain weight until now and unfortunately all the way is going to my stomach and my face . If I can get my arms thicker maybe fat wise then I can turn that into muscle. everything I see about hitting them bigger always talks about lifting bigger weights is that really the only way to get bigger arms? Again, I plan on doing that (lifting bigger weights) but say I didn't lift weights at all would there be anyway to get them bigger?