Answer:

girth

Answer	Crossword Clue
GIRTH	USPS datum
GIRTH	Waistline
GIRTH	Circumference

GIRTH	Tree measurement
GIRTH	Belt size, basically
GIRTH	Belt size, essentially
GIRTH	Measurement around the waist
GIRTH	Dieter's concern
GIRTH	Parcel Post dimension
GIRTH	Postal Service parcel measure
GIRTH	Bellyband

GIRTH	Saddle band
GIRTH	Dieter's problem.
GIRTH	Circumference.
GIRTH	Dimensions
GIRTH	Saddle holder
GIRTH	Band for holding a saddle
GIRTH	Horse's saddle strap
GIRTH	Saddle strap

GIRTH	Encircle
GIRTH	Size
GIRTH	Distance around
GIRTH	Saddle attachment
GIRTH	Waist size
GIRTH	Middle measurement
GIRTH	Body measurement
GIRTH	Tailor's measurement

GIRTH	Round-about measure?
GIRTH	Roundabout measure?
GIRTH	Dieter's target
GIRTH	It comes full circle
GIRTH	It holds the saddle in place