I had my eye on this set for a few months before I finally decided to purchase it. When it arrived, despite the description saying that the chains were included, the chains were not there. I reached out to customer service, and they arranged to send out the chains (in the correct size). However, when they arrived, they simply weren't long enough.
For reference, I usually purchase the s+ size top. In this case, the cups were a bit of a strange size, larger and a bit of an odd shape. But that was fine, as at least the band is adjustable. The band by default is approximately 74 cm, and stretchy. The chain that goes with the bra of that size is 70 cm. Ie, the chain which is depicted as going around the body and draping down is actually narrower than the bra band, and obviously won't fit around your rib cage.
In short, I would not recommend buying this. However, if you do, make sure that you additionally and separately purchase the chains in a larger size. As even if they arrive with your package, they are not going to fit you.