I think a small packet can be sufficient as long as it gives enough info about what you do and how you do it that the potential clients aren't left scratching their heads over how they can use your services. Your info packet doesn't necessarily have to be 'bigger' if you've been in business longer.

Maybe adding in a list of 'X number of things X company can do for you in less than an hour' would be a good marketing tool as well.
And don't forget to make it easy for them to find your website, call and email you - that should be on everything.

You could include a zillion possible things, but covering the very basics with good solid information is just fine too.

Check the marketing section for other ideas about what you might want to include.

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