The total weight is not known. This specimen of Gujba is 21.1 grams.   Size is 3.6 mm x 35 mm xx 43 mm.  It is one of our Museum specimens.  However, the page has it listed a 19.1 grams, the piece correct weight is 21.1 grams.
It is very hard to get this material.
  A great collection piece to add to any meteorite collection.