Mazal Tov, thumbthrough. May you build a BNB.
If your Kallah doesn’t have an iPod yet, then that might be an option. You can load her favorite songs on there before you wrap it. You may also be able to engrave it with her name or a short message on the back. Although I’m not sure if that’s possible on the iPod. Perhaps you can check with an engraver. (It might be too thin)
Another idea would be a nice pen with her name engraved on it.
A watch may be considered jewelry but it serves a practical/ functional purpose and is not just ornamental.
Also, a watch can look cute or fun if she doesn’t like a serious looking one so that may be something to consider.
Maybe a nice pair of designer shades. She can never have too many.
If your kallah appreciates flowers, you can get a nice vase and have it monogrammed.
interjection mentioned stud earrings.
Your Kallah will need earrings even if she is not the jewelry type.
Those are a real classic and so versatile. I think you cannot go wrong with diamond studs.
If you want to be on the safe side; you can ask her, but then you lose the element of surprise.