Sea scavenged seaglass, from Hossegor on the south west coast of France.  These pieces were all found around La Gravierre and La Nord surf breaks, which are pretty heavy spots, sometimes visited by world class surfers. 
The seaglass is encased in sterling silver and each is completely unique.
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 
To know which ring you’re buying go to the picture of the rings in the ring display, then count from top left to bottom right. 
The jewellery comes in a cotton gift bag and is delivered in plastic free packaging.   5% of profits goes to support marine conservation charities, this includes a donation made to Surfers Against Sewage who campaign for plastic free seas and one coral fragment being replanted by Coralive.org for every purchase made.  
There’s also an option at checkout to upgrade your coral fragment to a bigger one for just £5.  All proceeds will go to Coralive and you will receive a downloadable thank you to share on your social media stories.  
If this is a gift for someone else you can also buy a mini ‘Ocean Goddess’ giftcard at the checkout.