This is the 15620th most frequent German word.
winzige
"Tiny" or "very small."
Here, 'winzige' is an adjective describing a small-sized mouse, emphasizing its diminutive nature.
Die winzige Maus rannte schnell unter den Tisch.
The tiny mouse quickly ran under the table.
In this case, 'winzigen' modifies 'Riss' (crack), indicating that the crack is very small and almost imperceptible.
Ich fand einen winzigen Riss in dem Glas.
I found a tiny crack in the glass.
Here, 'winzige' describes 'Unterschied' (difference), stressing how the minor characteristic has a significant impact.