Please consider after viewing the profile. These are accessory parts for handmade items. I believe they are made of shell material. They were originally from a commercially available necklace, but the length and balance of the string didn't quite suit me... I intended to remake it, so I kept only the parts. They are unused. There may be a difference in color between the photos and the actual item. They appear rainbow-colored depending on the light and angle. I've included a photo taken on a grid mat to give you an idea of the size. The yellow color tends to come out strongly when placed on the mat. Although unused, they are still considered pre-owned, so please consider this before purchasing.