Just like most of us, I regularly face the client desire to 'make the logo bigger'. Especially in web designs, clients want to inflate their logos to ridiculous sizes.
How do I effectively counter this suggestion? I know it's almost never a good idea. I usually point out that most succesful websites have their logos displayed at a very modest size, but I'd like to have a better story to tell.
I point out to clients that large logos are the equivalent to SCREAMING at customers. When you walk into a store, do you want the sales rep to come up to you and scream, "HI! WHAT CAN I GET FOR YOU TODAY?!" or would you rather have the rep walk up and quietly ask, "Hi, what can I help you with today?" (It carries more weight when spoken :) )
I ask them to think of what has a higher perceived value -- a 32oz mug of coffee or a small cup of espresso? A 5 Ton truck or a 1 ton sports car? A big fat marker or a fine ball point pen?
Then I urge them to look at popular upper scale web sites (or even simply popular web sites) and note the size of the logos - then provide links. Then I point out some sites with large logos and ask "What is the immediate impression you get?"
If after all this, they want their logo 600px wide... they get their logo 600px wide and I lose a portfolio link :)