Old Make Do Ruler with Hand-Carved Numbers - Presumed for Liquid MeasureBest understood through detail photos, this ruler measures 12 inches long, but is carved with numbers that do not correspond to inches, but rather I believe marked liquid ounces. What I really like about this in addition to the smooth, beautifully worn wood that makes it just a pleasure to hold is that clearly it was a particular solution to a particular situation, I would think made to use in conjunction with a very specific vessel, perhaps a milking