This is a YELLOW color FIESTA DEMITASSE CUP (without saucer).   This is the non marked style that is in excellent condition.  There are no marks, chips, on damage of any kind.  It is 2 1/2 inches tall, the cup itself is 2 1/2 inches across and with the handle it is 3 3/4 inches.  The bottom is 1 1/2 inches with a white ring on it. The description is "Just a little man." Fiesta's Demitasse Coffee Set was designed for use as an after dinner (thus A.D.) strong coffee, some call it a chocolate pot as well.  The pot is discontinued before 1944 but, the cups were continued into the 1950's, so they will be found in the 1950's color as well.  They usually will not be marked.  As far as we know it is an original.