Браслет Pandora Pavé Flower

I wanted this the second I saw it online and thought it was going to be the free bangle with a purchase for mother's day. Unfortunately it wasn't in the US sale. I was crushed. Then I was browsing and found it online at Macy's. They only had 3 sizes. I'm a size 18 but they only had 17 and 19. I purchased both and figured I would put my charms on them and see which one worked best. Im so upset because with charms filling half of each bracelet, the 17 didn't budget. It was too tight. The 19 was way too loose. Even if I filled the entire bracelet with charms it would be too big. I also noticed the bracelet compared to my other bangles was much lighter. Im so upset because it's a stunning bracelet but if I can find it in a size 18 in the future I might purchase it. Both the 17 and 19 are getting returned.

It says 925 sterling silver? So that means it shouldn’t have any issue or defective? But its already greenish within few days. I want to post videos or pictures but it wont let me