Yeah, mine is also regular, I just measured all the dimensions to .001" with a digital caliper and calculated volume, if anything the volume will be a little bit less than calculated, with the stone having some rougher surfaces compared to the polished side. So mine might actually be a tiny bit higher than I calculated, but not a significant enough amount to worry about. I also don't know how accurate my scale is. I have a different very accurate scale that I trust but it only measures up to 8 oz.