These are the three stemware pieces from the American Pioneer pattern. The middle piece is often referred to as a Tall Sherbet, but it has the decorated stem of the other two pieces, so I consider it a stem.
Wine Stem height is 4"
top diameter 3-1/4" to 3-3/8"
base 2-3/8"
Second Stem: height 4-3/8"
top diameter 4-1/4"
base 2-7/8"
Water Stem: height 6-1/16"
top diam.3-1/2" to 3-9/16"
base 2-3/4"