And I've never actually seen a packer in real life. So I have no idea at all about sizes.
I was leaning towards the Ex.Small cause I don't exactly want to show it off, I just want something there, but I'm getting a lot of mixed reviews about the size for basic, everyday packing. A few people have said the Ex.Small is too small and you can barely see it.

So, I thought I'd ask all the guys here.

Which is better for packing? The Ex.Small or the Small Mr Limpy?

I always thought it was X-Small then medium, then large.

If by extra small you mean the 3.5 inch one I have that one.  I can't say from experience about te other one but the x-small does stick out a bit and could cause a bulge for you but not a super large one.  I like the x-small one because it's not imtimidating and it's a good size for me personally.  Plus it's relatively cheap.

Yeah, I think im leaning towards the X.Small

Found out someone asked this same question last year. Reading their replies lol

I am one of those people that has every size Mr Limpy. First one I got was the large then went smaller and smaller til I got to the extra small. The extra small is the right size. The only issue you might have is if you wear it with a harness that doesn't hold the shaft down since it always wants to stay sort of erect. If you wear briefs or tight underwear, you're fine.