I have a House of Staunton Chess set . Each piece weighs roughly the same amount . I would warrant a guess of about 2000g(2kg) for each peace though the king(of course)may weigh more .
How Heavy Are House Of Staunton Chess Pieces?

There is no set weight for chess pieces. As the weight and size can very from set to chess set. And material to material.
I will weight one of my HOS chess sets and post below.
King - 100 grams
Queen - 90 grams
Rook - 66 grams
Bishop -54 grams
Knight - 62 grams
Pawn - 40 grams
Thank you so much!! This is going to be super useful! I'll let you know how the chess set turns out!
I'm currently making a chess set and need to know how much each individual piece in a professional chess set weighs. If anyone could weigh each of their pieces that would be super helpful. Thanks!