I remember a list with the weight of most fi?ures on KickyWelt. Of course, quite a lot of collectors wanted to make sure what they would get and those who didn't want to "feel" their way along the line of bags went for a very precise set of scales (doing 10ths of grams) and the weight of most figures has been posted, if I remember correctly.
There are only 2-3 hard cases because of (almost) identical weight.
IF I can find that list, I'll post it here.
Simon