Hello Eric,
Thank you for showing interest in our material by requesting information on these specific items.
The River White 12x12 is no longer in stock and only is available in 12x24 size with a 3/8 thickness.
The Volga Blue is also 3/8 thick and currently good in stock.
if you would like, email me at [email protected] for further inquiries and such.
Thank you,
Meghan Q
Sales Associate
714-204-0981