Recommendation Letter Lengths?

I have gotten several recommendations from teachers and the lengths are around 2 to 4 paragraphs; however I have also asked my guidance counselor for an recommendation letter and she gave me a 3 paragraph one. I would think that the guidance counselor would give a 6+ paragraph one or so because it is supposed to be the ‘all-encompassing’ recommendation letter.
How long are your guys letter of recommendations from your counselor, and am I just worrying too much or is 3 paragraphs with 5 or so sentences each a good-lengthed counselor recommendation?