Size:

Diameter 8mm, width 5.3mm, hole 5.5mm, weight about 0.97g/pc

Diameter 10mm, width 5.3mm, hole 8mm, weight about 1.21g/pc

Diameter 12mm, width 5.3mm, hole 9.5mm, weight about 1.34g/pc

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