These are excellent for everyday-wear because they will look great with any outfit. They are simple, yet unique, and the best part is that although they look like spike gauges, you don't have to deal with an annoying screw backing. These are regular post earrings, so although they look like gauges they are just regular post earrings (NOT screw-back). This means that you could interchange the front and back however you would like--such as, using a pearl or diamond post with the spiked back, or the spiked front post with a regular back.
Both front and back spikes are 7mm x 9.5mm