These shank button packs are perfect for our Lora dress pattern. Each order comes with 13 buttons (the Lora dress calls for 12 buttons, but we added an extra in case you lengthen your pattern or want extra coverage). All button options are approximately 3/8" (or 10mm) wide. The matte black and matte white buttons are plastic with a slight dome shape and silver shank. They are a great basic shank button that will go with almost any fabric. The pearl resin buttons have a slightly more fancy look to them. They are somewhat clear, have a gold shank, and are round.