These are original John Deere e15233 rotary chopper Blades. These are no longer available through John Deere.  The rough dimensions are 6" l 2.5" w  1/4" t., the center hole is 1" approximately. I took the dimensions with a tape measure, so the not exact  , but pretty close.These are NOS , with slight surface rust which does not effect the blade integrity .These may also fit other models, I do not know.  It is up to the buyer to make sure these are the proper part for their needs. The price is for only one blade.