If the old blade has a label, check the length on the label or packaging first. The common quotation format is:
Length × Width × Thickness × TPI × Quantity
If the label is missing, photograph the old blade, the machine nameplate, and the equipment model. For butcher saws, woodworking equipment, or metal saws, different models may use different lengths. Providing machine information is usually more helpful than describing the use alone.
Do not estimate the length and place an order directly. Submit the information you already have, then confirm before quoting.