This is a piece that is a mystery. In most patterns, there are large and small sugar sifters. However, I can only find two references for Sugar Sifter Ladles and both are different than the other Sugar Sifter pieces in their respective patterns. They do seem to have a more curved shape to the bowl than the other "sifters". So I present to you the two examples of the Sugar Sifter Ladle:
Blackberry Vine By Tiffany(7 1/4 inches)
Colonial By Gorham (5 3/4 inches)