Size difference between brass cone piece and glass bowl

[Black Rabbit of Inle]

Hey guys,

I'm about to purchase a new GonG waterpipe. It'll be my first GonG and I am a little confused about the size of the bowl.

This is what I'm wanting to purchase:

NSFW:

Now I'm used to Australian standard brass cone pieces (or 'One Hitters' as I know some in the US call it) and was wondering how much bigger this new glass bowl would be.

The bowl and downstem are one piece so I'm not going to replace it immediately (although I'd prefer separate pieces).

 

[Chesh]

Much bigger.

Bowls like that are too big for me personally.