A beautiful trio of Opal gemstone, aqua sea glass and a keshi pearl. 
Opal is October’s birthstone and is said to be a great healing gemstone and good at improving communication and self confidence.  The colours are to represent the sunlight sparking on the the ocean surface. 
The keshi pearl is the most natural form of pearl and is pure nacre, these pearls are said to bring calming reflection as well as attune the wearer to the ebb and flow of life. Due to the pearls watery and lunar elements, it is quite balancing for the emotions, especially to water signs.  
The sea glass was found on the shores of Hossegor close to the famous surf breaks of la Nord & La gravière. 
They are each set on sterling silver bands which have a hammered effect to represent the ripples of the sea.  The rings can be worn in a stack or separately depending on how you feel! 
Individually the rings measure a U.K. size O 1/4. However when they are worn stacked together they will feel more like a U.K. size N. 
If you are unsure of your ring size or you need to convert your size from a different size system, you should find everything you need to know here; https://www.oceanboheme.co.uk/measure-your-ring-size