In the early 80 s, common size: 72mm、60mm、50mm、30mm，etc; Nowadays, has gradually changed to:60mm、48mm、45mm、40mm、30mm，etc; "Long" for the tape after open the total length, generally with the "m" or "code" means (1 code = 0.9144 m), common length50m、100m、150m、200m、500m，etc.; BOPP film thickness is refers to the original + glue line of the total thickness (unit: micron, μ m), commonly used have 45 to 55 μ m. Such as "“50mm×100m×50μm”"

           Each roll tape unit price calculation methods: tape industry usually use "yuan/square metre" to accounting tape price, then "every roll tape price = width (m) * length (m) * square price".