Strangest question I've ever had...

[fluter]

The sgian flute in the key of "D"...

Ah, but I actually have one :-) D is a little big. The one in my avatar is D, the standard baroque flute. I have one an octave higher, thus half the length. It's a little long, fat, and heavy because it's made of ebony, and wooden flutes have to be rather thick-walled.

Drobin, a garklein is getting to be the right size. It would be about half the length of the little flute.

A dear friend of mine years ago (who was also a piper) always carried a penny whistle in his hose top. Perhaps they've met.

That's what I was thinking of! I only have one in C, a touch longer than the D flute but it's much lighter and skinnier. I'm strictly a novice at whistle.