Condition is good with flaws.  The crown piece is starting to separate and needs to be realigned and glued back down.  You'll need clamps for this.  Lots of crazing lines in the gilt paint from how old it is.   Lots of chipping of the gilt paint on the sides / bottom.  I'm guessing how old it really is but it's obviously old.

Measurements are all approximate.

28" Wide x 20" Height (external)

Crown Height is 4.5" so total height with the crown is 24.5".

Internal measurements:  17.25" Height, 24" wide at narrowest and 25.25" at widest.

The frame is about 1 & 1/8" thick.  The frame is about 1.5" wide

Frame weight is about 3.5 lbs.