Rustic, industrial brutalist, Thunder has as stones of choice a carved old turtle bone and a small ceramic stoneware face set in solid sterling silver. 
Full of textures and asymmetrical but cohesive, medium sized -not the small sizes we find usually at the markets- an unusual pair specially in a fine metal.
One of a kind, the cards in the pictures are standard business cards and can give you an idea of their real size. (I don't know you but I'm tired of "false advertisement" where stores and shops take pictures on a hand that when we receive the stone or our purchase, it is super small and the picture's hand it is obviously a toddler's hand; so I add elements we can find in a wallet, business cards are about the size of your credit card)
They measure no counting ear wire 63 x 20mm and 56 x 19mm approx.