A 1890's white corset made by Ferris Bros.  I am of the opinion this may be a young lady's (teenager) corset (stays) from the research I have done.  The corset is made of sateen or coutil cotton with shoulder straps, or braces as they were called.  The buttons down the front are offset from the front boning, which is made of watchspring.  In all there are seven watchspring bones circling the garment.  The corset has short side laces at the hip area and back lacing completely down the center of back.  A pair of metal stocking fasteners on either side of the corset.  Each are marked with Ferris Bros. Pat'd Aug 27, 1889.  The shoulder straps are adjustable, allowing the strap four different settings.  The Ferris Bros label and number 26 is printed inside.  The label is worn enough it is difficult to read.

Condition:  Some soiling, especially under the arms.  

Measurements:  Length from the middle of the shoulder strap to the point center front is 22" long..  It would extend 1" longer if in last button hole.  2-1/2" shorter if in the first button hole.  Bust measurement is 28" around.  Waist is 26" around.