...and it has selected The Transmogrifier! Magazine will be on its way shortly.
Thanks all for offering your opinions! I couldn't show you more buttons of each type, as I'd only ordered a couple each for the decision (ordering 34 each of all these buttons would have cost a fortune :-) ). I could have zoomed out, true. But by the time I was done with the process I was pretty sure I was going with the orange buttons. They have now been ordered from Europe and are on their way to me.
The pullover is trimmed in blue, and I think the orange ring is going to make a nice contrast to it. If I really hate it, I'll go for the silver ones many of you picked as a second choice — they don't have to be ordered from as far away so I can get them quickly if needed.
Here's what the owls look like right now, buttonless:
It grew a little in the wash, and I think this'll be a little long on my friend K., but hopefully too long is better than too short. It'll get one more bath/reshaping before it travels, too. I love how yarn softens up when washed (carefully, obviously). I'll also attempt a little duplicate stitching at the back of the place where the blue trim meets the grey on the cuffs, so that if the arms are too long, K. can fold back the cuffs and have it still look all right. I'm a little worried about the underarms being tight — will just have to cross fingers on that. It's my first yoke sweater and I suppose everyone worries on their first one.