I found two more pictures of sea shells - these were for a friend who wanted to decorate a small tree for her studio (a finisher).
They are relatively small, at just 4 3/4" high for the blue shell, and 5" high for the yellow one before adding the outline for finishing. Of course you could enlarge either of them, and even put them on larger mesh canvas for a pillow or purse inset.
I may decide I need to stitch this blue one for myself, as I see Petite Very Velvet for the blue areas - or could even use a different color. Then the Kreinik #12 braid in 002V or the Vintage silver (can't remember the name of it right now, and my color card is in a drawer across the room).
The "nacre" finish of the pink/orange lip needs to be done in DMC Satin Floss, and the pearls are bump stitches with Renaissance Shimmer or Rainbow Gallery Flair.
I hope you enjoy these and can use them for yourselves and as gifts. There are lots of tutorials on this blog and on Possibilities, etc. to guide you in canvas prepraration if you haven't seen them. I'm still working on the trees, as I can see them as table settings through all seasons - or on the mantel.