Right...and some say in the text to go behind the withers and then show a picture of it going over the top of the withers! For some formulas (like the KER one that keko recommended) it's probably more important for accuracy that the tape is vertical, and for physical measurements (like for a saddle or harness), it's more important to measure where the actual thing will go around the horse. So just know your usage, I guess, but sheesh, the nerd in me wishes for two separate names.There are veterinary resources online that support both.