These are tiny, the whole bud with the red petals are 5-6 mm long.
Tricky to get a sharp pic without tripod or taking it indoors and shooting in studio conditions.
And I donīt kill plants...
Snapping photos outdoors will do!

"Common Hazel female catkins are very small and largely concealed in the buds with only the bright red 1–3 mm long styles visible."
From Wikipedia


4597 100412 700.jpg