Really, what the question title states. In my language there's a more "flowery" phrase to say "size doesn't matter". It would roughly translate to "even a small clown can work in the big top" – I'm looking for something that tries to maintain the wit of the "small"/"big" antithesis.
It's not the size of the boat, it's the motion of the ocean. comes (no pun intended) to mind, although I'm sure there are many more.
One that applies to more than just sex (expressing small size doesn't imply bad performance) is:
it's not the size of the dog in the fight, but the size of the fight in the dog
A commonly used expression (although not an idiom):
It's not the size that counts, it's how you use it.
"It's not the meat, it's the motion" is the one I've heard most frequently.
It's a grower not a shower at least implies function.
protected by tchrist♦ Mar 15 '14 at 15:09
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