Gold plated vintage hoop earrings, set on a base metal.

They measure. 

1. 3cm long, 1.3cm wide

2. 2cm long,  0.9cm wide

3. 2.3cm long, 2mm wide

4. 4.5cm long, 4mm widest point 

5. 3.3cm long, 4mm wide

6. 2.5cm long, 5mm widest point