How to choose the guide plate of chain saw correctly?

1. If there are numbers on the guide, please provide the numbers on the guide.

2. If there is no number on the guide plate, count the number of sections and the length of the guide plate without cutting the old chain short.

3.Chain model: 3/8 smaller, Number of chain links: 59 sections, Number of chain cutters: 29 bits, Length of guide plate:48 cm.

  Chain model: 325-18 inches, Number of chain links: 72 sections, Number of chain cutters: 36 bits, Length of guide plate:52 cm.

  Chain model: 325-19 inches, Number of chain links: 76 sections, Number of chain cutters: 38 bits, Length of guide plate:55 cm.

  Chain model: 3/8 bigger, Number of chain links: 68 sections, Number of chain cutters: 34 bits, Length of guide plate:55 cm.

  Chain model: 3/8 bigger, Number of chain links: 72 sections, Number of chain cutters: 36 bits, Length of guide plate:59 cm.

  Chain model: 404, Number of chain links: 64 sections, Number of chain cutters: 32 bits, Length of guide plate:58 cm.