I don’t own these pieces anymore, but thought these photos might be helpful for size reference. Pics below were taken before I sent these off to consignment several years ago.
After seeing my photos again, I remembered I’d ordered the Round Chain to be 20”, as the standard 24” felt like an awkward length for me with these size amulets. This chain isn't currently shown online (maybe stock is low) and I've also noticed some of the names of items have changed.
Regarding clasps, I love the bar style, clasp design on the Pearl Karina necklace and the sapphire chain. For the gold link necklaces, it appears the clasp design has changed. In the past they came with S hooks as shown below vs the current lobster claw style.
20 inch long, 6.4mm Classic Round Chain, with medium and small Rock Crystal Amulets.
View attachment 5229270
16" faceted white sapphire, Classic Longchain, with small and extra small Amulets.
View attachment 5229274
18” Double Pearl Karina necklace with extra small and small Amulets.
View attachment 5229275