is it acceptable to write some of the kanji wider than others? sometimes it seems impossible not to and i'm curious what japanese do. I'm sure there are worse one's but this comes to mind 越

Not really; kanji should be square. If you're having difficulty fitting them in use paper with larger squares. As you get better at it you'll be able to write them smaller.

even like this 雌? it seems almost impossible to make it legible and a square lolz.......
I'll get some grid paper I guess. I usually just use a notebook. so japanese really write them as perfect squares? I'll have to watch my girlfriend I guess lol

Perfect squares might be an exaggeration, but Japanese writing paper is split in to squares, so you don't really have any choice but to fit them in.

Well, people's handwriting ability varies, but you can't write it as 此隹 or it'd be interpreted as two separate kanji (not that that forms a word). My brain doesn't parse that as めす so at some point deviating from square will make your writing illegible (at least to this gaijin).

They are supposed to be square. Legibility is a matter of exposure. I have no trouble reading the kanji in your post and i'm guessing that's smaller than you'd hand write it. It's not necessary to be able to make out every stroke clearly once you're familiar with the kanji as a set as you only have to differentiate similar looking kanji (and usually context helps a lot too). Having said that, writing with something with a fine tip helps.

theadamie Wrote:so japanese really write them as perfect squares?

Not when writing freehand on blank white paper, they don't, but every Japanese -can- do so because you have to do so for school and traditional resumes. They generally do not write wide kanji, although I've seen some very -tall- kanji ... which in vertical writing can be very confusing indeed, but both casual writing and calligraphy styles tend to stretch vertically, never wide.

Anyway, you're best off to master basic square characters first. Unless you perfect school-child handwriting, your sloppy handwriting will not be a natural evolution away from it, it'll just be an illegible scrawl. Square paper helps. You can print your own: http://incompetech.com/graphpaper/genkoyoushi/

Native Japanese people do not literally write every kanji exactly the same size down to the millimeter. But you do need to make sure that you able to avoid two common traps of beginners -- both native and non-native. The first is what zigmonty mentioned; writing a left/right split kanji too widely apart so it looks like two kanji, e.g. 目民 instead of 眠. The second is the opposite, where a simple kanji is written too narrowly so it looks like it belongs as a component of the next one; i.e. 子 looking like it's the left side of something like 孔.

Practicing with genkoyoushi is a good idea at first.