No, but you can just draw a bigger area and then delete some of it if it's too big. That's what I do, at least.
Update. My first factory, it will process the products of my agriculture. We need more industry, though, SuperNova, if you want to build some.
And two collective farming villages.
Btw, I just reached about 90 buildings, so I've expanded my city hall. Soon, I may build 9 meter tall buildings, yay!