The phrase 'tiny gap' is correct and usable in written English.
You can use it to describe a very small space between two objects, such as: "I could barely see the tiny gap between the rocks."
Michelangelo leaves a tiny gap between them.
But there's still a tiny gap in the band.
Through a tiny gap in the curtains, I peer at the street.
Each tiny gap acts as a reservoir for a drug-and-polymer mix.
Unwanted areas of material are then etched away and the gate oxide is deposited onto the tiny gap.
When you brush afterwards, the fluoride in the toothpaste can seep into that tiny gap between each tooth".
He could sneak into houses through tiny gaps, without setting off any alarms.
We went out through Brooklyn, leaping for tiny gaps in the traffic.
They can, however, squeeze through tiny gaps, and they love to do the limbo.
As a result, tiny gaps in sound stimuli of just 3-4ms can elicit reliable APs that signal such brief offsets.
LOTS of money can be made in the tiny gaps between the buying and selling prices of shares.
