Hi 'pmx22984' and welcome to the forum
In the TV series they made the aliens much larger and heavier, I think it was so they could put a man in a rubber suit, I got the 2 disc DVD of Spielberg's new version for Christmas and on the second disc they talk about the 53 film, at the last moment before shooting the 'Martians hand on Sylvia's shoulder' scene, the Directer decided the Martian was too big, so the SFX Dept spent the Night remaking the ugly little guy but they didn't have time to remake the arms or hands, which is why the arms look too long for the body.