The original packaging from the manufacturer usually mentions the key saw blade information. These specs are also engraved on the saw blade itself.

Here is an example for reference only:

Flat / Right & Left Bevel Configuration
Outer Dia: 305mm / Bore Dia: 70.0mm
Kerf: 3.0mm / Plate: 2.2mm
2 Keyways: 12x5mm / Teeth: 36

Rake angle: 22°
Clearance angle: 10°
Face Bevel angle: 5°
Top Bevel angle: 5°