White bubble tip anemone questions

[fishoholic]

I saw an anemone just like this one:


and I want to get it for the dwarf darwin clowns I'm getting. I think the white anemone will look cool with the black and white Darwin's. I haven't found much info about this particular anemone but originally assumed it was like other BTA's. However I saw this one site that says it's size is 2-4" and says it's popular because it stays on the smaller side. Which would be perfect for my nano tank. Anyone know if it's true and these anemone stay smaller then the other BTA's?

link to the site I saw the above pic on
http://www.saltwaterfish.com/Bubble-...mone_p_19.html