I thought it was a teardrop from the side, hence my first question. The angle of the photo certainly does not help, the W/F Chimney vase tapers - or narrows to the top - the photo of the vase in question looks straight all the way down to me..
Whatever..............a better photo would clear it up!
However, if in real life it looks like the one on my blog, then it will be the smallest of the three sizes in which this pattern was made.