Size:

#1: diameter 6.8mm, thickness 6.8mm, hole 2mm, weight about 0.74g/pc

#2: diameter 5mm, thickness 5.8mm, hole 1.8mm, weight about 0.54g/pc

#3: diameter 5.8, thickness 5.5mm, hole 1.8mm, weight about 0.39g/pc

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