the.com/girth
The dimension everyone pretends not to measure but absolutely does.
horse originOriginally the strap cinching a saddle tight
tree scienceForesters measure trunk girth to estimate age
old norseRooted in 'gjörth,' meaning belt or hoop
engineeringPipe girth welds join sections end to end
vs lengthCircumference, not distance — a common math mix-up