Size:

Small: length 30mm, width 10mm, hole 1mm, weight about 3.3g/piece

Medium: length 39.5mm, width 12.5mm, hole 1mm, weight about 4.9 grams/piece

Large: length 44.5mm, width 16.5mm, hole 2mm, weight about 7.5g/piece

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