I have found conflicting opinions on this topic and was wondering if it might be useful to shed more light on it.
The Changa wiki states that,
Quote:"Fairly large bongs tend to dilute the smoke but is generally allot easier for inexperienced users. A small bong, around 10cm high, will give you a very strong and direct experience. The smoke goes straight from the cone to your lungs with very little air in the chamber to dilute it-".
However, some posts seem to suggest that the size does not dilute the potency or that a larger device will result in a more potent hit.
Quote:"Warning- if your using a bong and really hit it hard it is possible to vape an entire 100mg hit, so please start off with a half solid bong rip until you know how it hits. 10"-12" inch bongs especially!"
More quotes-
Quote:"I have a 30cm straight glass bong and it is epically efficient, it feels like the perfect size.
As long as your bong feels comfortable it will be fine."
Quote:"I like a big one, mine atm is around 40cm or so in size. Smile
I`d say it makes little difference, and is just a comfort thing, stick with what you have."