All the measurements below are for the garment itself. To select the right size, take a similar item, place it flat and measure it as done below.
These t-shirts have a unisex fit & sizing scale. So consider them as a boyfriend fit:
size S will fit women in NGNM size XS-S,
size M will fit most women in the range of NGNM M-L,
while size L will fit those who either like an extra over-size look or are in the range of size NGNM L-XL.