Size used in photo is the M size.
Cutter Base Measurements:
M - 55 x 27.5 mm (2.17 x 1.08 in)
L - 65 x 32.5 mm (2.56 x 1.28 in)
XL - 75 x 37.5 mm (2.95 x 1.48 in)
Does not come in S size due to intricacy.
All measurements are taken of the bases' exterior dimensions, rounded off to the nearest decimal.