If the earrings and necklace isnt on the right spot for your avatar or it is to small, you can move them around to adjust them to the proper spot. As we all use different body shapes and mesh heads they also contain resizing scripts to help you on the way. As an old timer we all know how it works but if you are new to Second life I will go over how it works. Click the item you want to resize, if you need it to be smaller or bigger. Causions, you can only make it as small as possible depending on the details on the item you want to change. Making it bigger is no problems only making it smaller might cause issues. When you click the item a pop up will show. Here you can pick how much bigger or smaller you would like it to be. Resize it until it fits your body shape. When you are happy with the result just close the pop up and you are ready to roam in Second Life