Not sure what kind of snail it is but it is huge. 4" maybe.
Have had this orange spine urchin for over 3 years now. Getting a bit on the large size for my taste (mmmmm.. Uni..). Anyway.. Urchin is probably about 4" as well.
... Actually both would make great appetizers, but I digress.
$1.25 for each or $1.27 for both.