As Hoodoo said:
I think how the knife fits in the hand is perhaps more important than how fancy the knife is, asuming it's not a complete POS.
I'll second that. I've found, for example, that I don't like the style of paring knife that looks like a miniature chef's knife. That's the style that Henckels, Wusthof, Sabatier, et al. sell. Obviously some other people like that style (a lot). Johno likes "the smaller handle" of the Forschners. I've found that in a paring knife, I like a fairly small blade with a larger handle (not as large as in a much larger knife, but larger than the blade). I know that doesn't actually describe it well, but it makes the point that there's a lot of variation here.
You've really got two choices of approach. Either you can go for the surprise and give your mother something new to try out and find out if she likes it or you can check it out with her and find out what kind of size and shape she's likely to use. Ask her what she likes and dislikes about whatever she has now. Look for something nice that maximizes the good points and minimizes the bad.
I have a Sabatier "paring knife" with about a 3" blade in the "miniature chef's knife" shape. When I bought it in 1972, I thought I'd like it a lot and spent what then seemed like a chunk of money for it. I find I use it about a half dozen times a year. (Yes, it is sharp and well maintained, thank you.) My favorite paring knife, which I use all the time, is a Russell Green River carbon steel blade, which I bought as a bare blade about 25 years ago and put on my own handle of exotic wood. The blade is a very thin spear-point, less than 1/16" thick at the thickest, but with a pronounced distal taper, so it's really
very thin and about 3/8" wide as it joins the handle. The handle is about 5/8" thick and about the same from "top" to "bottom", i.e., noticeably larger than the blade. It fits me well and gives me good control. I'm not suggesting that your mother will have the same preferences I do, but it would be a good idea to check with her.
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Paul Neubauer
prn@bsu.edu
Of what use is a philosopher who does not hurt anybody's feelings?
-- Diogenes