My Love is in size 16 and the Perlee is XS. The sizing of VCA is really confusing, they only have XS, M and L for Perlee pearl of gold. I tried size M which is way too big. But the Perlee signature has all sizes of XS, S, M and L. I did try the size S of that one and it is still a bit bigger. The XS is actually a bit smaller than size 16 Love, but they stack well and wont overlap.
I have this conclusion after visiting the boutique for many times:
size 16 Love = VCA XS
size 17 Love = VCA S (not available for pearl of gold)
size 18 Love = VCA M
Hope this can help