I understand size but why does weight matter to you? Aside from transporting them to and from the gig, they will remain on a stand or in their cymbal bag. Unless the reason you want to know the weight relates to cymbal thickness which does greatly affect how a cymbal sounds/plays.
for the most part I prefer thinner cymbals because to my ears they sound better, and they feel easier to play. I mentioned before that regardless of the type of gear used to record (even the most expensive state of the art gear) will only give you a slight idea due to all the variables involved. (The room used, the mic used, the recording gear used, then how the video is processed and such). Even if you were to be at the store in person, a cymbal vault will make the same cymbal sound very different from what it would sound like in your rehearsal space (no mics or recording gear involved), or from what it would sound like in different venue. So as others have commented here, if you don't have the opportunity to try them in person, and you don't end up liking them, then re-list them...