The full moon hoops have two option of hoops, One pair is bought in and one hoop is made hense the price difference. 
The full moon dangles can be taken off and just worn as hoops so you have options which its two pairs of earrings for one which is great!

The earrings are made from sterling silver 

The stud fitted hoop is hand made the length of this hoop with the full moon is-2.8cm

The inner hoop is made from a tube so the and the fitting interlocks into the tube.
The size of this hoop is- 2.7cm with the full moon 

Full moon hoops