Category List in widget – Size

We’re using the category widget on archive pages (like https://www.carsuk.net/places/essex/) to show available categories, but we’re struggling to make it look right (we’re not CSS masters!).

Having a single column will deliver too long a list, so we’d rather have it in two columns. But the minimum width in the CSS is 185px and we need it (I think) to be 158px.

The issue then is that the category name is truncated and it looks like the font size would need to be 10px to make all categories fully described. But is that too small? Or could the text be made to flow on to a second line but within the same size box and a more easily visible 12px?