Size:

Diameter 6mm, thickness 3.3mm, hole 1.3mm, weight about 0.34g/pc;

Diameter 8mm, thickness 3.5mm, hole 1.3mm, weight about 0.59g/pc;

Diameter 10mm, thickness 3.8mm, hole 1.4mm, weight about 0.92g/pc;

Diameter 12mm, thickness 3.8mm, hole 1.6mm, weight about 1.3g/pc;

Note: The size and weight are measured manually, so there will be some indirect measurement errors.