I should have left them where they were; in two days time they would have been considerably bigger.
But, that's a mushroom fanatic for you! I just had to pick them, and will throw them in with my roast chicken this evening (last night), along with a few chestnuts (it's feeling a tad autumnal here today).
The earliest I remember gathering Girolles was on a May 13th, so this is not far off my record. With any luck there'll soon be a few Cèpes around too.
I photographed them next to my small egg cup, just so you can see how desperate I was.