16 mm by 12 mm and 7 mm thick, these fancy jasper beads are a cross between an oval and a rectangle. The sides round out, the they are flat along the top and bottom where the hole is. However, all corners are rounded. The brown and white swirls range in tone from dark to light. The strands are interesting but the variations are harmonious within the strand. These beads are highly polished. Each strand is 16 inches long and contains approximately 24 beads.