The gap on these to put the jewelry in is pretty small, especially on smaller sizes. We would not recommend these for people with thick lobes because chances are they won't fit. If you try to "open" these up they will snap because they are made of horn. In order to get these on your lobe will have to get squished a little bit to fit into the gap and then once it slides in it will be fine.
6g has an insertion gap of approximately 1/8".
4g and 2g have an insertion gap of approximately 3/16".