Hi Jesper

have a look here


http://www.rapidprototype.com.au/
http://quotes.rapidprototype.com.au/

they have a online quote system, upload your STL, they will work out the volume and you can even work out rough prices in variuos metals, i.e silver, gold.... 111x73x3 should be well under 85 grams :)

this is the sort of result they give you.... has you can see my pendant with was 37.18 x 31.50 x 3.59 mm volume of just under 1cm3