I think Chris is the one saying he’s looking for the smallest liquid-filled.<br><br>I do agree that the main use of compasses in this size is just staying oriented- being able to pick a general direction and not going in circles.<br><br>The classic objection to dry compasses is that they take too long to settle down, and that does seem to be less of a problem the smaller they get. My only problem with them is that, in the half-inch or so size range, they seem to come in just two varieties – unbelievably cheap (party favor quality- if you order 10, two have already had the needles fall off) or unbelievably expensive (Brit/NATO versions at $35 each). I'd be glad to learn about some happy mediums.<br>