While veneers and Lumineers are almost the same, but Lumineers are much thinner than traditional veneers. This is because they are made out of a special, proprietary ceramic material that is only about 0.2mm thick. Due to their thin nature, Lumineers can often be placed without trimming your existing enamel. This is why they’re often called “no-prep” or “minimal-prep” veneers. Traditional veneers, on the other hand, are 0.5mm thick and require the removal of enamel to fit onto your tooth.