Wholesale 12 PCS Genuine Stainless Steel Fine Cable Chain Necklace Chains Bulk for Jewelry Making 18-30 Inches (18 Inch(1.5MM))

How big is the circular piece at the end that the clasp attaches to? Trying to see if a 3 mm hole will go over it (pearl). Thanks!

I see a comment about the chain tarnishing. Has anyone had this happen? Want something inexpensive, but not having to replace soon.

Is the 18 inch to long for a 7 year old child?

Does this chain have a brassy tone? I am looking for a light gold tone color, not an orange/brassy type of goldtone color. Thank you.