Sometimes we overlook doing a plain folded buttonhole band, but it gives a great result. It does not require a ribber or any fancy stitches, so you can do it on any machine.
I've seen a lot of different buttonhole techniques for this situation over the years, but I want my buttonholes to look perfect, or at least, look so good that if something's wrong you won't even notice it. I do not want any lumps, bumps, tight or loose spots, or changes in texture. Over the years, I've tried all kinds of things and I've finally come up with two preferred techniques that give the effect of the knitting just continuing right inside the buttonhole. This is the one for a band knitted vertically. I have a little different way to do it if your band is knitted sideways, and I'll put up a video about that later. It's grafted, and the buttonholes look incredible.
Yes, this buttonhole can be also used for hand knitting.
Best of all - if you can do a Kitchener graft from the wrong side, you can do this - it's easy. And if you don't graft, this buttonhole is do good that it's a great excuse to learn how.