The ornamental design for a subcutaneous fat thickness measurement apparatus, as shown and described.
FIG. 1 is a perspective view of a subcutaneous fat thickness measurement apparatus.
FIG. 2 is a front elevation view thereof.
FIG. 3 is a rear elevation view thereof.
FIG. 4 is a left side elevation view thereof.
FIG. 5 is a right side elevation view thereof.
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The portions of the subcutaneous fat thickness measurement apparatus shown in broken lines are for the purpose of showing environmental structure only and form no part of the claimed design.