Oh, the stories I could tell you about "smart" girls.
First off, on height. I don't really care and neither should you. If she's a pixie, something is attracting you to her and vice versa. The same idea applies if you're dating a WNBA player. If she's hot, and she doesn't see it as a problem, why do you? The only issue, as stated, is with kids. Assume the potential range for kid's heights will fall somewhere between the two of you and act accordingly. If you end up with a freakishly small son, you can always have him put on hormonal treatments during puberty (not ideal, but neither is being a 5 ft guy).
But back to intelligence/IQ/smarts. This can be a bit of a minefield to walk through with women. The only upside to this story is that (as I'm sure we all know) women cluster about the mean. So, it's far more likely that you will encounter several women of the same general intelligence than you will men of the same general intelligence.
The issues you may encounter are both absolute and relative to your own intelligence.
As far as the absolute ones go, women with higher IQ scores correlate (in almost all testing done on these matters) with two problems - higher infidelity rates and lower sexual interest. Oddly, these two points don't have to be mutually exclusive. And, the higher the IQ, the more likely the woman is to report one or both of these.
Relative to you, you have another suite of issues. I will speak more from personal experience here - over a decade working in university settings nets you a lot of experience with intelligent women (or women who think they are intelligent). So, let's start with that. I have met women with PhD after their names that couldn't tell me the capital of their home country. Education, especially now, is no indicator of IQ or intelligence. I will qualify that a bit by pointing out that, obviously, if she has a degree in higher mathematics from Caltech, that is something else entirely. Most women, even the very well educated, studied weak majors.
Another thought is that you want a girl who has an IQ within a small range of your own. Dating a girl thirty points lower on the scale is going to get old, fast. But, it will be the same for her if you are dating way up the scale. And, a person with a 145 IQ honestly does think differently from a person with a 100 IQ. It's just how it is.
Also, there is a "trap" area that I have noticed of girls who are just smart enough (and often expensively educated). Girls in the 110-120ish? area (I'm guessing) seem to be walking examples of the Dunning–Kruger effect (see most of my posts for an example of this effect
). Seriously though, you do not want a girl who thinks she's a genius when she is just mildly more intelligent than the median.
If I had complete control over the attributes of a girl I was going to LTR/marry, I would want one slightly less intelligent than me, who was not terribly interested in formal education, and who's natural inclination was to direct her intelligence towards either "traditionally feminine" activities or something lonerish and technical. I once dated a girl for a little bit who was quite smart and had taken a short course in graphic design. She worked from home doing technical drafting for sales manuals. So, the specs for reinforcing rebar slabs or scopes for a new sniper rifle - that sort of stuff. She was awesome to talk to and quite well read. But, she wasn't sullied by either the ideological indoctrination of modern universities, nor the attitude of status signalling that they gift their students.
On a final note, I have been "studying" couples and the like for quite a long time (I still do it - It's just unofficial now). Within the scope of what we are talking about, temperament and commonality of interests seem to trump all other areas for successful and contented LTRs and marriages. It is probably much more important that she can stand listening to you tell the same stupid joke 20,000 times than it is that she can discuss the finer points of plasma physics with you. That is, unless you are some sort of aspie with a hard on for plasma physics. But, that's your problem, not her's.